/* -*- coding: utf-8 -*- * * 607.cc: No.607 開通777年記念 - yukicoder */ #include<cstdio> #include<cstdlib> #include<cstring> #include<cmath> #include<iostream> #include<string> #include<vector> #include<map> #include<set> #include<stack> #include<list> #include<queue> #include<deque> #include<algorithm> #include<numeric> #include<utility> #include<complex> #include<functional> using namespace std; /* constant */ const int MAX_N = 1000; const int MAX_M = 1000; const int TARGET = 777; /* typedef */ /* global variables */ int as[MAX_N]; /* subroutines */ /* main */ int main() { int n, m; scanf("%d%d", &n, &m); for (int i = 0; i < m; i++) { int sum = 0; for (int j = 0, k = 0; j < n;) { int aij; scanf("%d", &aij); as[j] += aij; sum += as[j++]; while (k < j && sum > TARGET) sum -= as[k++]; if (sum == TARGET) { puts("YES"); return 0; } } } puts("NO"); return 0; }