#include using namespace std; #define REP(i,n) for(int i=0; i<(int)(n); i++) #define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++) #define ALL(x) (x).begin(), (x).end() const double PI = acos(-1); int n, m; int a[1024]; int b[1024]; int main() { ios_base::sync_with_stdio(0); cin.tie(0); cin >> n >> m; bool ck = false; REP (i, m) { set x; int acc = 0; x.insert(0); REP (i, n) { cin >> a[i]; b[i] += a[i]; acc += b[i]; x.insert(acc); if (x.count(acc - 777)) ck = true; } } if (ck) cout << "YES" << endl; else cout << "NO" << endl; return 0; }