Global List

All problems start from this list. Over time, they are moved to the topic-wise list if revealing the topic is not a spoiler for the problem. If it’s a spoiler, it’s moved to the secret topic.

The current problems in this page are the ones that I’ve solved but haven’t yet had the time to segregate. Do not assume them to be educational. However, all problems in the topic wise list are properly reviewed.

• Flip Flop Sum
• Line Trip
• Chip and Ribbon
• Add, Divide and Floor
• Halloumi Boxes
• StORage room
• Theofanis’ Nightmare
• Begginer’s Zelda
• Least Product

• Takahashi Quest
• Christmas Color Grid 1

Problems that I’ve solved, which are good for testing your skills, but doesn’t contain enough educational material.

• Destroying Bridges
• Equal XOR
• Median of an Array
• Farmer John’s Challenge

These are the problems that were shared with me, but I haven’t attempted them personally yet.

XOR Minimization (Shared by aryanc403).

• Ivan and Burgers

• (Zero XOR Subset)-less

• Number of Shortest Paths

• Counting Shortcuts

• Replace the Numbers

• Toss a Coin to Your Graph…

• Dist Max

• Tree Inversion

• Smaller Sum : Merge Sort tree, but easy version present on CF Step.

• Highest Ratio : Convex Hull / Graham Scan

• Breakdown

• Leaf Color : DP + Small to Large Trick.

• Count Paths : DP + Small to Large Trick.

• Feed Cats

• Compress Strings

• Insert or Erase

• Swap and Unite

• How many arrays

• It is a tree

• Rudolf and Subway

  • Snuke’s Subway Trip

• Rabbit Carrot

• How many arrays

• Count GCD

• Colorful Subsequence

• Many Lamps

• Sugoroku 5 : Create Easy Version

• String Bags

• Diversity of Scores