https://cfstep.com/leetcode/problems/problem-1/ https://cfstep.com/training/tutorials/trees/timer-on-trees/ancestor-relation/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/count-induced-subgraphs/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/count-spanning-subgraphs/ https://cfstep.com/training/educational-problems/leetcode/ https://cfstep.com/eolymp/basecamp/problem-11653/ https://cfstep.com/leetcode/problems/ https://cfstep.com/sapo/contests/sapo2015z/ https://cfstep.com/training/educational-problems/cp/topics/secret/ https://cfstep.com/training/educational-problems/leetcode/topics/secret/ https://cfstep.com/projects/leetcodeboard/resources/setup/ https://cfstep.com/codeforces/contests/contest-1901/problem-c/testcases/ https://cfstep.com/codeforces/contests/contest-1901/problem-b/testcases/ https://cfstep.com/codeforces/contests/contest-1132/problem-f/testcases/ https://cfstep.com/codeforces/contests/contest-1901/problem-d/testcases/ https://cfstep.com/codeforces/contests/contest-600/problem-c/testcases/ https://cfstep.com/eolymp/basecamp/problem-4853/ https://cfstep.com/training/ https://cfstep.com/training/tutorials/ https://cfstep.com/training/educational-problems/cp/topics/bitwise-operations/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/d-and-c/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/dp/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/graphs/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/math/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/probability-and-ev/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/secret/uncategorized/ https://cfstep.com/training/educational-problems/leetcode/topics/secret/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/strings/uncategorized/ https://cfstep.com/training/educational-problems/cp/topics/trees/uncategorized/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/unconstrained-binary-strings/ https://cfstep.com/training/tutorials/general-techniques/balanced-parenthesis-on-segments/balanced-substrings/ https://cfstep.com/codeforces/ https://cfstep.com/training/educational-problems/cp/ https://cfstep.com/training/educational-problems/cp/topics/dp/ https://cfstep.com/training/educational-problems/ https://cfstep.com/atcoder/contests/abc-210/problem-d/hints/ https://cfstep.com/atcoder/contests/abc-334/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1903/problem-a/hints/ https://cfstep.com/codeforces/contests/contest-1903/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-1903/problem-c/hints/ https://cfstep.com/codeforces/contests/contest-1903/problem-d1/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-c1/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-c2/hints/ https://cfstep.com/codeforces/contests/contest-1901/problem-c/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-1901/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-1919/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1917/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-1916/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1901/problem-a/hints/ https://cfstep.com/codeforces/contests/contest-1294/problem-f/hints/ https://cfstep.com/codeforces/contests/contest-1901/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-f/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-a/hints/ https://cfstep.com/codeforces/contests/contest-2209/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-a/hints/ https://cfstep.com/codeforces/contests/contest-2209/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-1175/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1975/problem-c/hints/ https://cfstep.com/codeforces/contests/contest-1132/problem-f/hints/ https://cfstep.com/atcoder/contests/abc-343/problem-g/hints/ https://cfstep.com/leetcode/problems/problem-3878/hints/ https://cfstep.com/codeforces/contests/contest-1996/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1744/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2209/problem-f/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-c1/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-c2/hints/ https://cfstep.com/codeforces/contests/contest-2209/problem-c/hints/ https://cfstep.com/codeforces/contests/contest-2209/problem-a/hints/ https://cfstep.com/codeforces/contests/contest-2044/problem-g1/hints/ https://cfstep.com/codeforces/contests/contest-1945/problem-h/hints/ https://cfstep.com/codeforces/contests/contest-2209/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-g/hints/ https://cfstep.com/leetcode/problems/problem-3887/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-f/hints/ https://cfstep.com/codeforces/contests/contest-1942/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-2201/problem-a1/hints/ https://cfstep.com/codeforces/contests/contest-2201/problem-a2/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-h/hints/ https://cfstep.com/atcoder/contests/abc-353/problem-g/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-825/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1102/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-2046/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-2180/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-a/hints/ https://cfstep.com/codeforces/contests/contest-2211/problem-g/hints/ https://cfstep.com/codeforces/contests/contest-2201/problem-c/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-2008/problem-h/hints/ https://cfstep.com/codeforces/contests/contest-1929/problem-d/hints/ https://cfstep.com/codeforces/contests/contest-1741/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-1923/problem-f/hints/ https://cfstep.com/codeforces/contests/contest-2210/problem-b/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-c/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-e/hints/ https://cfstep.com/codeforces/contests/contest-2204/problem-f/hints/ https://cfstep.com/codeforces/contests/contest-1946/problem-c/hints/ https://cfstep.com/atcoder/contests/abc-354/problem-f/hints/ https://cfstep.com/atcoder/contests/arc-135/problem-c/hints/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/induced-subgraphs-with-fixed-degree/ https://cfstep.com/training/tutorials/bitwise-operations/xor-is-minimized-for-adjacent-sorted-elements/minimum-xor-pair/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/no-consecutive-zeroes/ https://cfstep.com/training/tutorials/trees/timer-on-trees/subtree-size/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/swap-on-tree/ https://cfstep.com/projects/leetcodeboard/resources/tailwind-shadcn/ https://cfstep.com/atcoder/ https://cfstep.com/atcoder/contests/abc-333/problem-f/editorial/ https://cfstep.com/codeforces/contests/contest-1903/problem-c/editorial/ https://cfstep.com/codeforces/contests/contest-1903/problem-d1/editorial/ https://cfstep.com/codeforces/contests/contest-1913/problem-d/editorial/ https://cfstep.com/uva/problems/problem-11417/editorial/ https://cfstep.com/codechef/problems/bgme/editorial/ https://cfstep.com/codeforces/contests/contest-1954/problem-d/editorial/ https://cfstep.com/codeforces/contests/contest-2001/problem-e1/editorial/ https://cfstep.com/atcoder/contests/abc-344/problem-f/editorial/ https://cfstep.com/codeforces/contests/contest-2000/problem-h/editorial/ https://cfstep.com/training/educational-problems/cp/topics/graphs/ https://cfstep.com/projects/leetcodeboard/resources/header-footer/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/induced-subgraphs-with-compressed-degree/ https://cfstep.com/training/initiatives/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/k-zero-stream/ https://cfstep.com/training/resources/ https://cfstep.com/training/tutorials/trees/timer-on-trees/subtree-sum/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/sum-of-deg-sum/ https://cfstep.com/codeforces/contests/contest-580/problem-c/code/ https://cfstep.com/atcoder/contests/abc-062/problem-d/code/ https://cfstep.com/atcoder/contests/abc-120/problem-d/code/ https://cfstep.com/atcoder/contests/abc-126/problem-e/code/ https://cfstep.com/atcoder/contests/abc-130/problem-d/code/ https://cfstep.com/atcoder/contests/abc-179/problem-d/code/ https://cfstep.com/atcoder/contests/abc-209/problem-d/code/ https://cfstep.com/atcoder/contests/abc-210/problem-d/code/ https://cfstep.com/atcoder/contests/abc-218/problem-e/code/ https://cfstep.com/atcoder/contests/abc-248/problem-f/code/ https://cfstep.com/atcoder/contests/abc-260/problem-d/code/ https://cfstep.com/atcoder/contests/abc-275/problem-f/code/ https://cfstep.com/atcoder/contests/abc-277/problem-e/code/ https://cfstep.com/atcoder/contests/abc-291/problem-d/code/ https://cfstep.com/atcoder/contests/abc-304/problem-e/code/ https://cfstep.com/atcoder/contests/abc-333/problem-d/code/ https://cfstep.com/atcoder/contests/abc-333/problem-e/code/ https://cfstep.com/atcoder/contests/abc-333/problem-f/code/ https://cfstep.com/atcoder/contests/abc-334/problem-e/code/ https://cfstep.com/atcoder/contests/abc-334/problem-f/code/ https://cfstep.com/atcoder/contests/agc-005/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1903/problem-a/code/ https://cfstep.com/codeforces/contests/contest-1903/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1903/problem-c/code/ https://cfstep.com/codeforces/contests/contest-1903/problem-d1/code/ https://cfstep.com/codeforces/contests/contest-1905/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1913/problem-d/code/ https://cfstep.com/cses/problems/range-queries/problem-1646/code/ https://cfstep.com/cses/problems/range-queries/problem-1648/code/ https://cfstep.com/cses/problems/tree-algorithms/problem-1131/code/ https://cfstep.com/codeforces/contests/contest-1975/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1957/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1991/problem-c/code/ https://cfstep.com/codeforces/contests/contest-1901/problem-c/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-d/code/ https://cfstep.com/atcoder/contests/abc-341/problem-e/code/ https://cfstep.com/uva/problems/problem-10342/code/ https://cfstep.com/training/tutorials/trees/timer-on-trees/ancestor-relation/code/ https://cfstep.com/codeforces/contests/contest-1175/problem-d/code/ https://cfstep.com/training/tutorials/dp/ascent-and-prefix-maxima/code/ https://cfstep.com/training/tutorials/general-techniques/balanced-parenthesis-on-segments/balanced-substrings/code/ https://cfstep.com/codeforces/contests/contest-1975/problem-a/code/ https://cfstep.com/codeforces/contests/contest-1942/problem-b/code/ https://cfstep.com/training/tutorials/general-techniques/binary-lifting/code/ https://cfstep.com/codeforces/contests/contest-1625/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1946/problem-d/code/ https://cfstep.com/atcoder/contests/abc-342/problem-f/code/ https://cfstep.com/codeforces/contests/contest-1918/problem-d/code/ https://cfstep.com/codechef/problems/bgme/code/ https://cfstep.com/codeforces/contests/contest-1995/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1975/problem-c/code/ https://cfstep.com/leetcode/problems/problem-1497/code/ https://cfstep.com/codechef/problems/zxc/code/ https://cfstep.com/codechef/problems/p5149/code/ https://cfstep.com/codeforces/contests/contest-1901/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1132/problem-f/code/ https://cfstep.com/codeforces/contests/contest-1954/problem-d/code/ https://cfstep.com/codeforces/contests/contest-2004/problem-d/code/ https://cfstep.com/atcoder/contests/abc-343/problem-g/code/ https://cfstep.com/codeforces/contests/contest-1200/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1029/problem-d/code/ https://cfstep.com/baekjoon/problems/problem-20297/code/ https://cfstep.com/codeforces/contests/contest-2002/problem-e/code/ https://cfstep.com/training/tutorials/math/count-arrays-with-fixed-product/code/ https://cfstep.com/leetcode/problems/problem-3878/code/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/count-induced-subgraphs/code/ https://cfstep.com/codeforces/contests/contest-1923/problem-e/code/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/count-spanning-subgraphs/code/ https://cfstep.com/leetcode/problems/problem-3297/code/ https://cfstep.com/leetcode/problems/problem-3298/code/ https://cfstep.com/leetcode/problems/problem-3320/code/ https://cfstep.com/codechef/problems/countwinsub/code/ https://cfstep.com/codeforces/contests/contest-1920/problem-e/code/ https://cfstep.com/cses/problems/graph-algorithms/problem-1679/code/ https://cfstep.com/codeforces/contests/contest-2001/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1944/problem-a/code/ https://cfstep.com/codeforces/contests/contest-2001/problem-e1/code/ https://cfstep.com/codeforces/contests/contest-20/problem-c/code/ https://cfstep.com/cses/problems/tree-algorithms/problem-1139/code/ https://cfstep.com/training/tutorials/dp/distinct-subsequences-of-a-string/distinct-subsequences/code/ https://cfstep.com/leetcode/problems/problem-940/code/ https://cfstep.com/codeforces/contests/contest-1744/problem-d/code/ https://cfstep.com/training/tutorials/trees/dp-on-trees/downward-path-with-only-last-vertex-black/code/ https://cfstep.com/codeforces/contests/contest-1854/problem-b/code/ https://cfstep.com/atcoder/contests/abc-344/problem-f/code/ https://cfstep.com/codeforces/edu/segment-trees/earthquakes/code/ https://cfstep.com/codeforces/contests/contest-1944/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1917/problem-b/code/ https://cfstep.com/codeforces/contests/contest-2020/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1942/problem-a/code/ https://cfstep.com/leetcode/problems/problem-3266/code/ https://cfstep.com/leetcode/problems/problem-3321/code/ https://cfstep.com/baekjoon/problems/problem-14517/code/ https://cfstep.com/codeforces/contests/contest-1778/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1778/problem-a/code/ https://cfstep.com/codeforces/contests/contest-2044/problem-g1/code/ https://cfstep.com/codeforces/contests/contest-1945/problem-h/code/ https://cfstep.com/codeforces/contests/contest-1955/problem-g/code/ https://cfstep.com/baekjoon/problems/problem-17471/code/ https://cfstep.com/training/tutorials/trees/timer-on-trees/happy-life-in-university/code/ https://cfstep.com/atcoder/contests/abc-335/problem-f/code/ https://cfstep.com/codeforces/contests/contest-1994/problem-c/code/ https://cfstep.com/codeforces/contests/contest-817/problem-d/code/ https://cfstep.com/cses/problems/dynamic-programming/problem-1145/code/ https://cfstep.com/leetcode/problems/problem-3887/code/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/induced-subgraphs-with-compressed-degree/code/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/induced-subgraphs-with-fixed-degree/code/ https://cfstep.com/codeforces/contests/contest-1976/problem-d/code/ https://cfstep.com/codeforces/contests/contest-2007/problem-d/code/ https://cfstep.com/codeforces/contests/contest-2007/problem-e/code/ https://cfstep.com/codechef/problems/healthytree/code/ https://cfstep.com/sapo/contests/sapo2015z/jazz/code/ https://cfstep.com/codeforces/contests/contest-449/problem-b/code/ https://cfstep.com/codechef/problems/remk/code/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/k-zero-stream/code/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/k-zero-stream-hard/code/ https://cfstep.com/codechef/problems/cxz/code/ https://cfstep.com/codechef/problems/mma/code/ https://cfstep.com/codeforces/contests/contest-2000/problem-h/code/ https://cfstep.com/codeforces/contests/contest-1942/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1917/problem-a/code/ https://cfstep.com/codeforces/contests/contest-1901/problem-a/code/ https://cfstep.com/atcoder/contests/abc-050/problem-c/code/ https://cfstep.com/codeforces/contests/contest-600/problem-c/code/ https://cfstep.com/atcoder/contests/abc-340/problem-e/code/ https://cfstep.com/training/tutorials/trees/timer-on-trees/max-sum-on-downward-path/code/ https://cfstep.com/training/tutorials/general-techniques/answering-queries-offline-with-sweepline/max-value-less-than-threshold/code/ https://cfstep.com/codeforces/contests/contest-1997/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1946/problem-b/code/ https://cfstep.com/eolymp/basecamp/problem-11653/code/ https://cfstep.com/codeforces/contests/contest-1993/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1946/problem-a/code/ https://cfstep.com/atcoder/contests/abc-353/problem-g/code/ https://cfstep.com/codeforces/contests/contest-1944/problem-c/code/ https://cfstep.com/codeforces/contests/contest-825/problem-e/code/ https://cfstep.com/leetcode/problems/problem-3326/code/ https://cfstep.com/leetcode/problems/problem-64/code/ https://cfstep.com/training/tutorials/bitwise-operations/xor-is-minimized-for-adjacent-sorted-elements/minimum-xor-pair/code/ https://cfstep.com/codeforces/contests/contest-1928/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1102/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1950/problem-e/code/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/no-consecutive-zeroes/code/ https://cfstep.com/atcoder/contests/abc-335/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1944/problem-d/code/ https://cfstep.com/training/tutorials/dp/distinct-subsequences-of-a-string/paths-to-a-goal/code/ https://cfstep.com/training/tutorials/trees/dp-on-trees/paths-with-terminal-black-vertices/code/ https://cfstep.com/codeforces/contests/contest-1996/problem-g/code/ https://cfstep.com/codeforces/contests/contest-1490/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1937/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1562/problem-c2/code/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/prologue-to-leaf-color/code/ https://cfstep.com/training/tutorials/general-techniques/answering-queries-offline-with-sweepline/prologue-to-smaller-sum/code/ https://cfstep.com/oj-uz/problems/lmio19_triusis/code/ https://cfstep.com/codeforces/contests/contest-1988/problem-e/code/ https://cfstep.com/leetcode/problems/problem-1331/code/ https://cfstep.com/codeforces/contests/contest-1948/problem-f/code/ https://cfstep.com/leetcode/problems/problem-3282/code/ https://cfstep.com/leetcode/problems/problem-546/code/ https://cfstep.com/codeforces/contests/contest-1941/problem-g/code/ https://cfstep.com/codeforces/contests/contest-2008/problem-h/code/ https://cfstep.com/codeforces/contests/contest-1929/problem-d/code/ https://cfstep.com/atcoder/contests/abc-343/problem-f/code/ https://cfstep.com/leetcode/problems/problem-3276/code/ https://cfstep.com/codeforces/contests/contest-1741/problem-e/code/ https://cfstep.com/atcoder/contests/abc-374/problem-e/code/ https://cfstep.com/atcoder/contests/abc-347/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1950/problem-g/code/ https://cfstep.com/codeforces/contests/contest-1923/problem-d/code/ https://cfstep.com/atcoder/contests/abc-339/problem-e/code/ https://cfstep.com/atcoder/contests/arc-061/problem-c/code/ https://cfstep.com/codeforces/contests/contest-2019/problem-d/code/ https://cfstep.com/atcoder/contests/abc-158/problem-d/code/ https://cfstep.com/atcoder/contests/abc-450/problem-f/code/ https://cfstep.com/atcoder/contests/abc-271/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1183/problem-h/code/ https://cfstep.com/training/tutorials/trees/timer-on-trees/subtree-size/code/ https://cfstep.com/training/tutorials/trees/timer-on-trees/subtree-sum/code/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/sum-of-deg-sum/code/ https://cfstep.com/codeforces/contests/contest-1879/problem-d/code/ https://cfstep.com/atcoder/contests/abc-340/problem-d/code/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/swap-on-tree/code/ https://cfstep.com/codeforces/contests/contest-1955/problem-h/code/ https://cfstep.com/codeforces/contests/contest-1988/problem-d/code/ https://cfstep.com/eolymp/basecamp/problem-4853/code/ https://cfstep.com/codeforces/contests/contest-1294/problem-f/code/ https://cfstep.com/training/tutorials/general-techniques/time-travel-in-greedy-algorithms/time-travel/code/ https://cfstep.com/baekjoon/problems/problem-2098/code/ https://cfstep.com/codeforces/contests/contest-1946/problem-c/code/ https://cfstep.com/baekjoon/problems/problem-25515/code/ https://cfstep.com/codeforces/contests/contest-2003/problem-d1/code/ https://cfstep.com/codeforces/contests/contest-2003/problem-d2/code/ https://cfstep.com/leetcode/problems/problem-1/code/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/unconstrained-binary-strings/code/ https://cfstep.com/atcoder/contests/abc-354/problem-f/code/ https://cfstep.com/leetcode/problems/problem-3136/code/ https://cfstep.com/codeforces/contests/contest-1926/problem-g/code/ https://cfstep.com/atcoder/contests/abc-365/problem-e/code/ https://cfstep.com/atcoder/contests/arc-135/problem-c/code/ https://cfstep.com/atcoder/contests/abc-121/problem-d/code/ https://cfstep.com/codeforces/contests/contest-1971/problem-g/code/ https://cfstep.com/codeforces/contests/contest-1901/problem-d/code/ https://cfstep.com/atcoder/contests/abc-353/problem-e/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-c1/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-c2/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-f/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-d/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-a/code/ https://cfstep.com/codeforces/contests/contest-2209/problem-e/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-d/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-a/code/ https://cfstep.com/codeforces/contests/contest-2209/problem-b/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-e/code/ https://cfstep.com/codeforces/contests/contest-1996/problem-e/code/ https://cfstep.com/codeforces/contests/contest-2209/problem-f/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-c1/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-c2/code/ https://cfstep.com/codeforces/contests/contest-2209/problem-c/code/ https://cfstep.com/codeforces/contests/contest-2209/problem-a/code/ https://cfstep.com/codeforces/contests/contest-2209/problem-d/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-g/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-f/code/ https://cfstep.com/codeforces/contests/contest-2201/problem-a1/code/ https://cfstep.com/codeforces/contests/contest-2201/problem-a2/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-h/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-b/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-e/code/ https://cfstep.com/codeforces/contests/contest-2046/problem-b/code/ https://cfstep.com/codeforces/contests/contest-2180/problem-e/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-a/code/ https://cfstep.com/codeforces/contests/contest-2211/problem-g/code/ https://cfstep.com/codeforces/contests/contest-2201/problem-c/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-b/code/ https://cfstep.com/codeforces/contests/contest-1923/problem-f/code/ https://cfstep.com/codeforces/contests/contest-2210/problem-b/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-c/code/ https://cfstep.com/cses/problems/range-queries/problem-1647/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-e/code/ https://cfstep.com/codeforces/contests/contest-2204/problem-f/code/ https://cfstep.com/cses/ https://cfstep.com/codeforces/contests/contest-1920/problem-e/editorial/ https://cfstep.com/projects/leetcodeboard/resources/form-and-routes/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/k-zero-stream-hard/ https://cfstep.com/training/tutorials/trees/timer-on-trees/max-sum-on-downward-path/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/prologue-to-leaf-color/ https://cfstep.com/atcoder/contests/abc-334/problem-f/slides/ https://cfstep.com/codeforces/contests/contest-1946/problem-d/slides/ https://cfstep.com/codeforces/contests/contest-1923/problem-e/slides/ https://cfstep.com/atcoder/contests/abc-335/problem-f/slides/ https://cfstep.com/codeforces/contests/contest-1942/problem-d/slides/ https://cfstep.com/codeforces/contests/contest-1944/problem-d/slides/ https://cfstep.com/codeforces/contests/contest-1955/problem-h/slides/ https://cfstep.com/codeforces/contests/contest-1926/problem-g/slides/ https://cfstep.com/training/educational-problems/cp/topics/strings/ https://cfstep.com/atcoder/contests/agc-005/ https://cfstep.com/training/tutorials/trees/timer-on-trees/happy-life-in-university/ https://cfstep.com/training/educational-problems/cp/topics/trees/ https://cfstep.com/uva/ https://cfstep.com/training/educational-problems/cp/topics/probability-and-ev/ https://cfstep.com/sapo/ https://cfstep.com/codeforces/contests/contest-1294/problem-f/todo/ https://cfstep.com/baekjoon/ https://cfstep.com/training/educational-problems/cp/topics/bitwise-operations/ https://cfstep.com/codeforces/contests/contest-1294/problem-f/comments/ https://cfstep.com/eolymp/ https://cfstep.com/codeforces/contests/contest-1294/problem-f/blog/ https://cfstep.com/codechef/ https://cfstep.com/training/educational-problems/cp/topics/d-and-c/ https://cfstep.com/training/educational-problems/cp/topics/math/ https://cfstep.com/oj-uz/ https://cfstep.com/ladders/ https://cfstep.com/codeforces/contests/contest-20/ https://cfstep.com/atcoder/contests/abc-050/ https://cfstep.com/atcoder/contests/arc-061/ https://cfstep.com/atcoder/contests/abc-062/ https://cfstep.com/leetcode/problems/problem-64/ https://cfstep.com/atcoder/contests/abc-120/ https://cfstep.com/atcoder/contests/abc-121/ https://cfstep.com/atcoder/contests/abc-126/ https://cfstep.com/atcoder/contests/abc-130/ https://cfstep.com/atcoder/contests/arc-135/ https://cfstep.com/atcoder/contests/abc-158/ https://cfstep.com/atcoder/contests/abc-179/ https://cfstep.com/atcoder/contests/abc-209/ https://cfstep.com/atcoder/contests/abc-210/ https://cfstep.com/atcoder/contests/abc-218/ https://cfstep.com/atcoder/contests/abc-248/ https://cfstep.com/atcoder/contests/abc-260/ https://cfstep.com/atcoder/contests/abc-271/ https://cfstep.com/atcoder/contests/abc-275/ https://cfstep.com/atcoder/contests/abc-277/ https://cfstep.com/atcoder/contests/abc-291/ https://cfstep.com/atcoder/contests/abc-304/ https://cfstep.com/atcoder/contests/abc-333/ https://cfstep.com/atcoder/contests/abc-334/ https://cfstep.com/atcoder/contests/abc-335/ https://cfstep.com/atcoder/contests/abc-339/ https://cfstep.com/atcoder/contests/abc-340/ https://cfstep.com/atcoder/contests/abc-341/ https://cfstep.com/atcoder/contests/abc-342/ https://cfstep.com/atcoder/contests/abc-343/ https://cfstep.com/atcoder/contests/abc-344/ https://cfstep.com/atcoder/contests/abc-347/ https://cfstep.com/atcoder/contests/abc-353/ https://cfstep.com/atcoder/contests/abc-354/ https://cfstep.com/atcoder/contests/abc-365/ https://cfstep.com/atcoder/contests/abc-374/ https://cfstep.com/codeforces/contests/contest-449/ https://cfstep.com/atcoder/contests/abc-450/ https://cfstep.com/leetcode/problems/problem-546/ https://cfstep.com/codeforces/contests/contest-580/ https://cfstep.com/codeforces/contests/contest-600/ https://cfstep.com/codeforces/contests/contest-817/ https://cfstep.com/codeforces/contests/contest-825/ https://cfstep.com/leetcode/problems/problem-940/ https://cfstep.com/codeforces/contests/contest-1029/ https://cfstep.com/codeforces/contests/contest-1102/ https://cfstep.com/cses/problems/tree-algorithms/problem-1131/ https://cfstep.com/codeforces/contests/contest-1132/ https://cfstep.com/cses/problems/tree-algorithms/problem-1139/ https://cfstep.com/cses/problems/dynamic-programming/problem-1145/ https://cfstep.com/codeforces/contests/contest-1175/ https://cfstep.com/codeforces/contests/contest-1183/ https://cfstep.com/codeforces/contests/contest-1200/ https://cfstep.com/codeforces/contests/contest-1294/ https://cfstep.com/leetcode/problems/problem-1331/ https://cfstep.com/codeforces/contests/contest-1490/ https://cfstep.com/leetcode/problems/problem-1497/ https://cfstep.com/codeforces/contests/contest-1562/ https://cfstep.com/codeforces/contests/contest-1625/ https://cfstep.com/cses/problems/range-queries/problem-1646/ https://cfstep.com/cses/problems/range-queries/problem-1647/ https://cfstep.com/cses/problems/range-queries/problem-1648/ https://cfstep.com/cses/problems/graph-algorithms/problem-1679/ https://cfstep.com/codeforces/contests/contest-1741/ https://cfstep.com/codeforces/contests/contest-1744/ https://cfstep.com/codeforces/contests/contest-1778/ https://cfstep.com/codeforces/contests/contest-1854/ https://cfstep.com/codeforces/contests/contest-1879/ https://cfstep.com/codeforces/contests/contest-1901/ https://cfstep.com/codeforces/contests/contest-1903/ https://cfstep.com/codeforces/contests/contest-1905/ https://cfstep.com/codeforces/contests/contest-1913/ https://cfstep.com/codeforces/contests/contest-1916/ https://cfstep.com/codeforces/contests/contest-1917/ https://cfstep.com/codeforces/contests/contest-1918/ https://cfstep.com/codeforces/contests/contest-1919/ https://cfstep.com/codeforces/contests/contest-1920/ https://cfstep.com/codeforces/contests/contest-1923/ https://cfstep.com/codeforces/contests/contest-1926/ https://cfstep.com/codeforces/contests/contest-1928/ https://cfstep.com/codeforces/contests/contest-1929/ https://cfstep.com/codeforces/contests/contest-1937/ https://cfstep.com/codeforces/contests/contest-1941/ https://cfstep.com/codeforces/contests/contest-1942/ https://cfstep.com/codeforces/contests/contest-1944/ https://cfstep.com/codeforces/contests/contest-1945/ https://cfstep.com/codeforces/contests/contest-1946/ https://cfstep.com/codeforces/contests/contest-1948/ https://cfstep.com/codeforces/contests/contest-1950/ https://cfstep.com/codeforces/contests/contest-1954/ https://cfstep.com/codeforces/contests/contest-1955/ https://cfstep.com/codeforces/contests/contest-1957/ https://cfstep.com/codeforces/contests/contest-1971/ https://cfstep.com/codeforces/contests/contest-1975/ https://cfstep.com/codeforces/contests/contest-1976/ https://cfstep.com/codeforces/contests/contest-1988/ https://cfstep.com/codeforces/contests/contest-1991/ https://cfstep.com/codeforces/contests/contest-1993/ https://cfstep.com/codeforces/contests/contest-1994/ https://cfstep.com/codeforces/contests/contest-1995/ https://cfstep.com/codeforces/contests/contest-1996/ https://cfstep.com/codeforces/contests/contest-1997/ https://cfstep.com/codeforces/contests/contest-2000/ https://cfstep.com/codeforces/contests/contest-2001/ https://cfstep.com/codeforces/contests/contest-2002/ https://cfstep.com/codeforces/contests/contest-2003/ https://cfstep.com/codeforces/contests/contest-2004/ https://cfstep.com/codeforces/contests/contest-2007/ https://cfstep.com/codeforces/contests/contest-2008/ https://cfstep.com/codeforces/contests/contest-2019/ https://cfstep.com/codeforces/contests/contest-2020/ https://cfstep.com/codeforces/contests/contest-2044/ https://cfstep.com/codeforces/contests/contest-2046/ https://cfstep.com/baekjoon/problems/problem-2098/ https://cfstep.com/codeforces/contests/contest-2180/ https://cfstep.com/codeforces/contests/contest-2201/ https://cfstep.com/codeforces/contests/contest-2204/ https://cfstep.com/codeforces/contests/contest-2209/ https://cfstep.com/codeforces/contests/contest-2210/ https://cfstep.com/codeforces/contests/contest-2211/ https://cfstep.com/leetcode/problems/problem-3136/ https://cfstep.com/leetcode/problems/problem-3266/ https://cfstep.com/leetcode/problems/problem-3276/ https://cfstep.com/leetcode/problems/problem-3282/ https://cfstep.com/leetcode/problems/problem-3297/ https://cfstep.com/leetcode/problems/problem-3298/ https://cfstep.com/leetcode/problems/problem-3320/ https://cfstep.com/leetcode/problems/problem-3321/ https://cfstep.com/leetcode/problems/problem-3326/ https://cfstep.com/leetcode/problems/problem-3878/ https://cfstep.com/leetcode/problems/problem-3887/ https://cfstep.com/baekjoon/problems/problem-14517/ https://cfstep.com/baekjoon/problems/problem-17471/ https://cfstep.com/baekjoon/problems/problem-20297/ https://cfstep.com/baekjoon/problems/problem-25515/ https://cfstep.com/training/tutorials/dp/distinct-subsequences-of-a-string/paths-to-a-goal/ https://cfstep.com/atcoder/contests/abc-126/problem-e/ https://cfstep.com/uva/problems/problem-10342/ https://cfstep.com/uva/problems/problem-11417/ https://cfstep.com/codeforces/contests/contest-2210/problem-a/ https://cfstep.com/codeforces/contests/contest-2211/problem-a/ https://cfstep.com/codeforces/contests/contest-1975/problem-a/ https://cfstep.com/codeforces/contests/contest-1944/problem-a/ https://cfstep.com/codeforces/contests/contest-1942/problem-a/ https://cfstep.com/codeforces/contests/contest-1778/problem-a/ https://cfstep.com/codeforces/contests/contest-2209/problem-a/ https://cfstep.com/codeforces/contests/contest-1903/problem-a/ https://cfstep.com/codeforces/contests/contest-1917/problem-a/ https://cfstep.com/codeforces/contests/contest-1901/problem-a/ https://cfstep.com/codeforces/contests/contest-1946/problem-a/ https://cfstep.com/codeforces/contests/contest-2204/problem-a/ https://cfstep.com/codeforces/contests/contest-2201/problem-a1/ https://cfstep.com/codeforces/contests/contest-2201/problem-a2/ https://cfstep.com/training/tutorials/general-techniques/answering-queries-offline-with-sweepline/ https://cfstep.com/atcoder/contests/agc-005/problem-b/ https://cfstep.com/codeforces/contests/contest-1975/problem-b/ https://cfstep.com/codeforces/contests/contest-2209/problem-b/ https://cfstep.com/codeforces/contests/contest-1905/problem-b/ https://cfstep.com/codeforces/contests/contest-1942/problem-b/ https://cfstep.com/codeforces/contests/contest-1901/problem-b/ https://cfstep.com/codeforces/contests/contest-1854/problem-b/ https://cfstep.com/codeforces/contests/contest-1944/problem-b/ https://cfstep.com/codeforces/contests/contest-1917/problem-b/ https://cfstep.com/codeforces/contests/contest-449/problem-b/ https://cfstep.com/codeforces/contests/contest-1946/problem-b/ https://cfstep.com/codeforces/contests/contest-2211/problem-b/ https://cfstep.com/codeforces/contests/contest-2046/problem-b/ https://cfstep.com/codeforces/contests/contest-2204/problem-b/ https://cfstep.com/codeforces/contests/contest-2210/problem-b/ https://cfstep.com/codeforces/contests/contest-1903/problem-b/ https://cfstep.com/training/tutorials/general-techniques/balanced-parenthesis-on-segments/ https://cfstep.com/eolymp/basecamp/ https://cfstep.com/training/tutorials/bitwise-operations/ https://cfstep.com/tags/blind/ https://cfstep.com/codechef/problems/bgme/ https://cfstep.com/atcoder/contests/abc-050/problem-c/ https://cfstep.com/atcoder/contests/arc-135/problem-c/ https://cfstep.com/codeforces/contests/contest-1991/problem-c/ https://cfstep.com/codeforces/contests/contest-1901/problem-c/ https://cfstep.com/codeforces/contests/contest-1975/problem-c/ https://cfstep.com/codeforces/contests/contest-20/problem-c/ https://cfstep.com/codeforces/contests/contest-2209/problem-c/ https://cfstep.com/codeforces/contests/contest-1994/problem-c/ https://cfstep.com/codeforces/contests/contest-580/problem-c/ https://cfstep.com/codeforces/contests/contest-600/problem-c/ https://cfstep.com/codeforces/contests/contest-1944/problem-c/ https://cfstep.com/codeforces/contests/contest-2201/problem-c/ https://cfstep.com/codeforces/contests/contest-2204/problem-c/ https://cfstep.com/codeforces/contests/contest-1903/problem-c/ https://cfstep.com/codeforces/contests/contest-1946/problem-c/ https://cfstep.com/codeforces/contests/contest-2210/problem-c1/ https://cfstep.com/codeforces/contests/contest-2211/problem-c1/ https://cfstep.com/codeforces/contests/contest-2210/problem-c2/ https://cfstep.com/codeforces/contests/contest-2211/problem-c2/ https://cfstep.com/codeforces/contests/contest-1562/problem-c2/ https://cfstep.com/categories/ https://cfstep.com/codechef/problems/zxc/ https://cfstep.com/codechef/problems/p5149/ https://cfstep.com/atcoder/contests/ https://cfstep.com/codeforces/contests/ https://cfstep.com/sapo/contests/ https://cfstep.com/training/tutorials/general-techniques/contribution-technique-on-trees/ https://cfstep.com/training/tutorials/math/count-arrays-with-fixed-product/ https://cfstep.com/codechef/problems/countwinsub/ https://cfstep.com/training/initiatives/cplapse/ https://cfstep.com/training/initiatives/cplapse/february-2024/ https://cfstep.com/atcoder/contests/abc-062/problem-d/ https://cfstep.com/atcoder/contests/abc-209/problem-d/ https://cfstep.com/atcoder/contests/abc-120/problem-d/ https://cfstep.com/atcoder/contests/abc-260/problem-d/ https://cfstep.com/atcoder/contests/abc-130/problem-d/ https://cfstep.com/atcoder/contests/abc-333/problem-d/ https://cfstep.com/atcoder/contests/abc-291/problem-d/ https://cfstep.com/atcoder/contests/abc-179/problem-d/ https://cfstep.com/atcoder/contests/abc-210/problem-d/ https://cfstep.com/atcoder/contests/abc-158/problem-d/ https://cfstep.com/atcoder/contests/abc-340/problem-d/ https://cfstep.com/atcoder/contests/abc-121/problem-d/ https://cfstep.com/codeforces/contests/contest-1957/problem-d/ https://cfstep.com/codeforces/contests/contest-2210/problem-d/ https://cfstep.com/codeforces/contests/contest-2204/problem-d/ https://cfstep.com/codeforces/contests/contest-2211/problem-d/ https://cfstep.com/codeforces/contests/contest-1913/problem-d/ https://cfstep.com/codeforces/contests/contest-1175/problem-d/ https://cfstep.com/codeforces/contests/contest-1625/problem-d/ https://cfstep.com/codeforces/contests/contest-1946/problem-d/ https://cfstep.com/codeforces/contests/contest-1918/problem-d/ https://cfstep.com/codeforces/contests/contest-1995/problem-d/ https://cfstep.com/codeforces/contests/contest-1954/problem-d/ https://cfstep.com/codeforces/contests/contest-2004/problem-d/ https://cfstep.com/codeforces/contests/contest-1029/problem-d/ https://cfstep.com/codeforces/contests/contest-1744/problem-d/ https://cfstep.com/codeforces/contests/contest-1778/problem-d/ https://cfstep.com/codeforces/contests/contest-2209/problem-d/ https://cfstep.com/codeforces/contests/contest-817/problem-d/ https://cfstep.com/codeforces/contests/contest-1976/problem-d/ https://cfstep.com/codeforces/contests/contest-2007/problem-d/ https://cfstep.com/codeforces/contests/contest-1942/problem-d/ https://cfstep.com/codeforces/contests/contest-2001/problem-d/ https://cfstep.com/codeforces/contests/contest-1997/problem-d/ https://cfstep.com/codeforces/contests/contest-1993/problem-d/ https://cfstep.com/codeforces/contests/contest-1944/problem-d/ https://cfstep.com/codeforces/contests/contest-1490/problem-d/ https://cfstep.com/codeforces/contests/contest-1937/problem-d/ https://cfstep.com/codeforces/contests/contest-1929/problem-d/ https://cfstep.com/codeforces/contests/contest-1923/problem-d/ https://cfstep.com/codeforces/contests/contest-2019/problem-d/ https://cfstep.com/codeforces/contests/contest-1879/problem-d/ https://cfstep.com/codeforces/contests/contest-1988/problem-d/ https://cfstep.com/codeforces/contests/contest-1901/problem-d/ https://cfstep.com/codeforces/contests/contest-1903/problem-d1/ https://cfstep.com/codeforces/contests/contest-2003/problem-d1/ https://cfstep.com/codeforces/contests/contest-2003/problem-d2/ https://cfstep.com/training/tutorials/graphs/dijkstra-is-bfs-in-disguise/ https://cfstep.com/training/tutorials/dp/distinct-subsequences-of-a-string/distinct-subsequences/ https://cfstep.com/training/tutorials/trees/dp-on-trees/downward-path-with-only-last-vertex-black/ https://cfstep.com/tags/dp/ https://cfstep.com/training/tutorials/trees/dp-on-induced-subgraphs-of-a-tree/ https://cfstep.com/training/tutorials/trees/dp-on-spanning-subgraphs-of-a-tree/ https://cfstep.com/training/tutorials/trees/dp-on-trees/ https://cfstep.com/cses/problems/dynamic-programming/ https://cfstep.com/training/tutorials/dp/ https://cfstep.com/atcoder/contests/abc-341/problem-e/ https://cfstep.com/atcoder/contests/abc-334/problem-e/ https://cfstep.com/atcoder/contests/abc-277/problem-e/ https://cfstep.com/atcoder/contests/abc-218/problem-e/ https://cfstep.com/atcoder/contests/abc-304/problem-e/ https://cfstep.com/atcoder/contests/abc-340/problem-e/ https://cfstep.com/atcoder/contests/abc-335/problem-e/ https://cfstep.com/atcoder/contests/abc-374/problem-e/ https://cfstep.com/atcoder/contests/abc-347/problem-e/ https://cfstep.com/atcoder/contests/abc-339/problem-e/ https://cfstep.com/atcoder/contests/arc-061/problem-c/ https://cfstep.com/atcoder/contests/abc-271/problem-e/ https://cfstep.com/atcoder/contests/abc-333/problem-e/ https://cfstep.com/atcoder/contests/abc-365/problem-e/ https://cfstep.com/atcoder/contests/abc-353/problem-e/ https://cfstep.com/codeforces/contests/contest-2209/problem-e/ https://cfstep.com/codeforces/contests/contest-2210/problem-e/ https://cfstep.com/codeforces/contests/contest-1200/problem-e/ https://cfstep.com/codeforces/contests/contest-2002/problem-e/ https://cfstep.com/codeforces/contests/contest-1923/problem-e/ https://cfstep.com/codeforces/contests/contest-1920/problem-e/ https://cfstep.com/codeforces/contests/contest-1919/problem-e/ https://cfstep.com/codeforces/contests/contest-1996/problem-e/ https://cfstep.com/codeforces/edu/segment-trees/earthquakes/ https://cfstep.com/codeforces/contests/contest-2020/problem-e/ https://cfstep.com/codeforces/contests/contest-1916/problem-e/ https://cfstep.com/codeforces/contests/contest-2007/problem-e/ https://cfstep.com/codeforces/contests/contest-825/problem-e/ https://cfstep.com/codeforces/contests/contest-2211/problem-e/ https://cfstep.com/codeforces/contests/contest-1928/problem-e/ https://cfstep.com/codeforces/contests/contest-1102/problem-e/ https://cfstep.com/codeforces/contests/contest-1950/problem-e/ https://cfstep.com/codeforces/contests/contest-2180/problem-e/ https://cfstep.com/codeforces/contests/contest-1988/problem-e/ https://cfstep.com/codeforces/contests/contest-1741/problem-e/ https://cfstep.com/codeforces/contests/contest-2204/problem-e/ https://cfstep.com/codeforces/contests/contest-2001/problem-e1/ https://cfstep.com/codeforces/edu/ https://cfstep.com/training/tutorials/strings/extending-binary-strings/ https://cfstep.com/atcoder/contests/abc-342/problem-f/ https://cfstep.com/atcoder/contests/abc-333/problem-f/ https://cfstep.com/atcoder/contests/abc-334/problem-f/ https://cfstep.com/atcoder/contests/abc-344/problem-f/ https://cfstep.com/atcoder/contests/abc-275/problem-f/ https://cfstep.com/atcoder/contests/abc-335/problem-f/ https://cfstep.com/atcoder/contests/abc-248/problem-f/ https://cfstep.com/atcoder/contests/abc-343/problem-f/ https://cfstep.com/atcoder/contests/abc-450/problem-f/ https://cfstep.com/atcoder/contests/abc-354/problem-f/ https://cfstep.com/codeforces/contests/contest-2210/problem-f/ https://cfstep.com/codeforces/contests/contest-1132/problem-f/ https://cfstep.com/codeforces/contests/contest-2209/problem-f/ https://cfstep.com/codeforces/contests/contest-2211/problem-f/ https://cfstep.com/codeforces/contests/contest-1948/problem-f/ https://cfstep.com/codeforces/contests/contest-1923/problem-f/ https://cfstep.com/codeforces/contests/contest-2204/problem-f/ https://cfstep.com/codeforces/contests/contest-1294/problem-f/ https://cfstep.com/atcoder/contests/abc-343/problem-g/ https://cfstep.com/atcoder/contests/abc-353/problem-g/ https://cfstep.com/codeforces/contests/contest-1955/problem-g/ https://cfstep.com/codeforces/contests/contest-2204/problem-g/ https://cfstep.com/codeforces/contests/contest-1996/problem-g/ https://cfstep.com/codeforces/contests/contest-2211/problem-g/ https://cfstep.com/codeforces/contests/contest-1941/problem-g/ https://cfstep.com/codeforces/contests/contest-1950/problem-g/ https://cfstep.com/codeforces/contests/contest-1926/problem-g/ https://cfstep.com/codeforces/contests/contest-1971/problem-g/ https://cfstep.com/codeforces/contests/contest-2044/problem-g1/ https://cfstep.com/training/tutorials/general-techniques/ https://cfstep.com/training/educational-problems/cp/global-list/ https://cfstep.com/cses/problems/graph-algorithms/ https://cfstep.com/training/tutorials/graphs/ https://cfstep.com/codeforces/contests/contest-1945/problem-h/ https://cfstep.com/codeforces/contests/contest-2000/problem-h/ https://cfstep.com/codeforces/contests/contest-2211/problem-h/ https://cfstep.com/codeforces/contests/contest-2008/problem-h/ https://cfstep.com/codeforces/contests/contest-1183/problem-h/ https://cfstep.com/codeforces/contests/contest-1955/problem-h/ https://cfstep.com/ https://cfstep.com/codechef/problems/healthytree/ https://cfstep.com/sapo/contests/sapo2015z/jazz/ https://cfstep.com/codechef/problems/remk/ https://cfstep.com/codechef/problems/cxz/ https://cfstep.com/codechef/problems/mma/ https://cfstep.com/leetcode/ https://cfstep.com/ladders/leetcode/ https://cfstep.com/projects/leetcodeboard/ https://cfstep.com/training/tutorials/dp/lis-using-trie/ https://cfstep.com/training/tutorials/math/ https://cfstep.com/training/tutorials/trees/dp-on-trees/paths-with-terminal-black-vertices/ https://cfstep.com/baekjoon/problems/ https://cfstep.com/codechef/problems/ https://cfstep.com/cses/problems/ https://cfstep.com/oj-uz/problems/ https://cfstep.com/uva/problems/ https://cfstep.com/projects/ https://cfstep.com/training/tutorials/general-techniques/answering-queries-offline-with-sweepline/prologue-to-smaller-sum/ https://cfstep.com/training/tutorials/dp/push-dp-vs-pull-dp/ https://cfstep.com/training/tutorials/general-techniques/quirks-of-non-existent-map-elements/ https://cfstep.com/oj-uz/problems/lmio19_triusis/ https://cfstep.com/cses/problems/range-queries/ https://cfstep.com/projects/leetcodeboard/resources/ https://cfstep.com/codeforces/edu/segment-trees/ https://cfstep.com/codeforces/contests/contest-2210/problem-a/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-a/statement/ https://cfstep.com/codeforces/contests/contest-2209/problem-a/statement/ https://cfstep.com/codeforces/contests/contest-2201/problem-a1/statement/ https://cfstep.com/codeforces/contests/contest-2201/problem-a2/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-d/statement/ https://cfstep.com/codeforces/contests/contest-2209/problem-b/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-b/statement/ https://cfstep.com/codeforces/contests/contest-2046/problem-b/statement/ https://cfstep.com/codeforces/contests/contest-2210/problem-b/statement/ https://cfstep.com/codeforces/contests/contest-2209/problem-c/statement/ https://cfstep.com/codeforces/contests/contest-2201/problem-c/statement/ https://cfstep.com/codeforces/contests/contest-2210/problem-c1/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-c1/statement/ https://cfstep.com/codeforces/contests/contest-2210/problem-c2/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-c2/statement/ https://cfstep.com/leetcode/problems/problem-3878/statement/ https://cfstep.com/codeforces/contests/contest-2210/problem-d/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-d/statement/ https://cfstep.com/codeforces/contests/contest-2209/problem-d/statement/ https://cfstep.com/codeforces/contests/contest-2209/problem-e/statement/ https://cfstep.com/codeforces/contests/contest-2210/problem-e/statement/ https://cfstep.com/codeforces/contests/contest-1996/problem-e/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-e/statement/ https://cfstep.com/codeforces/contests/contest-2180/problem-e/statement/ https://cfstep.com/codeforces/contests/contest-2210/problem-f/statement/ https://cfstep.com/codeforces/contests/contest-2209/problem-f/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-f/statement/ https://cfstep.com/codeforces/contests/contest-1923/problem-f/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-g/statement/ https://cfstep.com/codeforces/contests/contest-2044/problem-g1/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-g/statement/ https://cfstep.com/codeforces/contests/contest-2211/problem-h/statement/ https://cfstep.com/leetcode/problems/problem-3887/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-a/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-b/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-c/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-e/statement/ https://cfstep.com/codeforces/contests/contest-2204/problem-f/statement/ https://cfstep.com/training/tutorials/strings/ https://cfstep.com/tags/ https://cfstep.com/training/tutorials/trees/diameter-of-a-tree/ https://cfstep.com/training/tutorials/dp/the-hardest-easy-dp-problem/ https://cfstep.com/training/tutorials/general-techniques/time-travel-in-greedy-algorithms/time-travel/ https://cfstep.com/training/tutorials/general-techniques/time-travel-in-greedy-algorithms/ https://cfstep.com/training/tutorials/trees/timer-on-trees/ https://cfstep.com/training/educational-problems/cp/topics/ https://cfstep.com/training/educational-problems/leetcode/topics/ https://cfstep.com/cses/problems/tree-algorithms/ https://cfstep.com/training/tutorials/trees/ https://cfstep.com/tags/upsolve/ https://cfstep.com/atcoder/contests/abc-334/problem-f/video/ https://cfstep.com/codeforces/contests/contest-1913/problem-d/video/ https://cfstep.com/codeforces/contests/contest-1946/problem-d/video/ https://cfstep.com/codeforces/contests/contest-1923/problem-e/video/ https://cfstep.com/atcoder/contests/abc-335/problem-f/video/ https://cfstep.com/codeforces/contests/contest-1942/problem-d/video/ https://cfstep.com/codeforces/contests/contest-1944/problem-d/video/ https://cfstep.com/codeforces/contests/contest-1955/problem-h/video/ https://cfstep.com/codeforces/contests/contest-1926/problem-g/video/ https://cfstep.com/codeforces/contests/contest-2204/problem-f/script/ https://cfstep.com/ladders/leetcode/volume-1/ https://cfstep.com/training/tutorials/bitwise-operations/xor-is-minimized-for-adjacent-sorted-elements/