#include using namespace std; using ll = long long; using ul = unsigned long; using ull = unsigned long long; int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int n, m; cin >> n >> m; bool success{ false }; vector a(n, 0); for (int i = 0; i < m; ++i) { for (auto&& it : a) { int aa; cin >> aa; if (aa == 777) { success = true; break; } it += aa; } if (success) break; int right{ 0 }; ll sum{ 0 }; for (int left = 0; left < n; ++left) { while (right < n && sum + a[right] <= 777) sum += a[right++]; if (sum == 777) { success = true; break; } if (left == right) ++right; else sum -= a[left]; } if (success) break; } cout << (success ? "YES" : "NO") << "\n"; return 0; }