#include #include #include using namespace std; int main() { int N, M; cin >> N >> M; vector vec(N, 0); for (int i = 0; i < M; i++) { for (int j = 0; j < N; j++) { int x; cin >> x; vec[j] += x; } int left = 0, right = 0, sum = vec[0]; while (true) { if (sum < 777) { right++; if (right == N) break; sum += vec[right]; } else if (sum > 777) { sum -= vec[left]; left++; if (left == N) break; } else if (sum == 777) { cout << "YES" << endl; return 0; } } } cout << "NO" << endl; return 0; }