#include <iostream>
using namespace std;

int n, m;
int main(void){
    // Your code here!
    cin >> n >> m;
    int A[m][n];
    int B[m][n+1];

    for(int i = 0; i < m; i++){
        for(int j = 1; j <= n; j++){
            cin >> A[i][j];
        }
    }
    
    for(int i = 1; i < m; i++){
        for(int j = 1; j <= n; j++){
            A[i][j] = A[i][j] + A[i-1][j]; 
        }
    }
    
    for(int i = 0; i < m; i++){
        B[i][0] = 0;
        for(int j = 1; j <= n; j++){
            B[i][j] = B[i][j-1] + A[i][j];
        }
    }
    
    
    
    
    for(int k = 0; k < m; k++){
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= i; j++){
                if(B[k][i] - B[k][j-1] == 777){
                    cout << "YES" << endl;
                    return 0;
                }
            }
        }
    }
    
    
    cout << "NO" << endl;
    
}