#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1e9 + 10;
const ll INFL = 4e18;

int main() {
    int N, M;
    cin >> N >> M;
    vector<bool> E(1 << N, false);
    vector<int> A(M);
    for (int i = 0; i < M; i++) {
        for (int j = 0; j < N; j++) {
            char a;
            cin >> a;
            A[i] |= (a == '1') << j;
        }
        E[A[i]] = true;
    }

    bool ans = true;
    for (int i = 0; i < M; i++) {
        for (int j = 0; j < M; j++) {
            if (!E[A[i] | A[j]]) ans = false;
            if (!E[A[i] & A[j]]) ans = false;
        }
    }

    if (!E.front()) ans = false;
    if (!E.back()) ans = false;

    puts(ans ? "Yes" : "No");
}