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