using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var c = NList;
        var (n, m) = (c[0], c[1]);
        var s = new int[m];
        for (var i = 0; i < m; ++i)
        {
            var t = ReadLine();
            var si = 0;
            for (var j = 0; j < t.Length; ++j)
            {
                si <<= 1;
                si += t[j] - '0';
            }
            s[i] = si;
        }
        WriteLine(Judge(n, m, s) ? "Yes" : "No");
    }
    static bool Judge(int n, int m, int[] s)
    {
        var set = new HashSet<int>(s);
        var bitmax = 1 << n;
        if (!set.Contains(0) || !set.Contains(bitmax - 1)) return false;
        var dic = new bool[n * n][];
        for (var i = 0; i < dic.Length; ++i) dic[i] = new bool[4];
        foreach (var si in s)
        {
            for (var i = 0; i < n; ++i)
            {
                var l = (si >> i) & 1;
                for (var j = i + 1; j < n; ++j)
                {
                    var r = (si >> j) & 1;
                    dic[i * n + j][l * 2 + r] = true;
                }
            }
        }
        for (var b = 0; b < bitmax; ++b)
        {
            var flg = true;
            for (var i = 0; i < n; ++i) for (var j = i + 1; j < n; ++j)
            {
                if (!flg) break;
                var l = (b >> i) & 1;
                var r = (b >> j) & 1;
                if (!dic[i * n + j][l * 2 + r]) flg = false;
            }
            if (flg)
            {
                // WriteLine($"check exists {b}");
                if (!set.Contains(b)) return false;
            }
        }
        return true;
    }
    class UnionFindTree
    {
        int[] roots;
        public UnionFindTree(int size)
        {
            roots = new int[size];
            for (var i = 0; i < size; ++i) roots[i] = -1;
        }
        public int GetRoot(int a)
        {
            if (roots[a] < 0) return a;
            return roots[a] = GetRoot(roots[a]);
        }
        public bool IsSameTree(int a, int b)
        {
            return GetRoot(a) == GetRoot(b);
        }
        public bool Unite(int a, int b)
        {
            var x = GetRoot(a);
            var y = GetRoot(b);
            if (x == y) return false;
            if (-roots[x] < -roots[y]) { var tmp = x; x = y; y = tmp; }
            roots[x] += roots[y];
            roots[y] = x;
            return true;
        }
        public int GetSize(int a)
        {
            return -roots[GetRoot(a)];
        }
    }
}