using System; public class Hello { static void Main() { string[] line = Console.ReadLine().Trim().Split(' '); var n = int.Parse(line[0]); var m = int.Parse(line[1]); getAns(n, m); } static void getAns (int n, int m) { var a = new int[n]; for (int i = 0; i < m; i++) { string[] line = Console.ReadLine().Trim().Split(' '); for (int j = 0; j < n; j++) a[j] += int.Parse(line[j]); if (check(n, a)) { Console.WriteLine("YES"); return; } } Console.WriteLine("NO"); } static bool check ( int n, int[] a) { var s = 0; var j = 0; for (int i = 0; i < n; i++) { while (j < n ) { s += a[j++]; if (s == 777) { return true; } else if (s > 777) break; } s -= a[i]; } return false; } }