Code: The Equalizer

// 2217A - The Equalizer
#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int t;
    cin >> t;
    while (t--) {
        int n, k;
        cin >> n >> k;

        long long sum = 0;
        for (int i = 0; i < n; ++i) {
            int x;
            cin >> x;
            sum += x;
        }

        long long after_special = 1LL * n * k;
        bool first_wins = (after_special % 2 == 0) || (sum % 2 == 1);
        cout << (first_wins ? "YES" : "NO") << '\n';
    }

    return 0;
}

#include <bits/stdc++.h>
using namespace std;

void solve() {
    int N, K;
    cin >> N >> K;
    vector<int> A(N);
    int asum = 0;
    for (int i = 0; i < N; i++) {
        cin >> A[i];
        asum += A[i];
    }
    if (asum % 2 == 1) {
        cout << "YES" << '\n';
    } else if ((K * N) % 2 == 0) {
        cout << "YES" << '\n';
    } else {
        cout << "NO" << '\n';
    }
}

int main() {
    ios_base::sync_with_stdio(false), cin.tie(nullptr);
    int T;
    cin >> T;
    while (T--)
        solve();
}