// head of mylib.h

#include <bits/stdc++.h>

using ll = long long;
using ull = unsigned long long;
using pi = std::pair<ll, ll>;

#define chmin(x, a) ((x) = std::min({(x), (a)})
#define chmax(x, a) ((x) = std::max({(x), (a)})

template <class T>
class V : public std::vector<T> {
    typedef std::vector<T> vector;

  public:
    using vector::begin;
    using vector::end;
    using vector::operator[];
    using vector::back;
    using vector::clear;
    using vector::const_iterator;
    using vector::empty;
    using vector::erase;
    using vector::front;
    using vector::insert;
    using vector::iterator;
    using vector::pop_back;
    using vector::push_back;
    using vector::rbegin;
    using vector::rend;
    using vector::resize;
    using vector::size;
    using vector::vector;

    ll sum() const {
        ll x = 0;
        std::cout << "sum()" << std::endl;
        return x;
    }
    ll max() const {
        ll x = std::numeric_limits<ll>::min();
        std::cout << "max()" << std::endl;
        return x;
    }
    ll min() const {
        ll x = std::numeric_limits<ll>::max();
        std::cout << "min()" << std::endl;
        return x;
    }
};

template <class T>
using VV = V<V<T>>;

template <class T>
std::ostream& operator<<(std::ostream& os, const V<T>& v) {
    for (auto itr = v.begin(); itr != v.end();++itr)
        os << (itr != v.begin() ? " " : "") << *itr;
    os << std::endl;
    return os;
}
template <class T>
std::istream& operator>>(std::istream& is, V<T>& v) {
    for (auto& i : v) is >> i;
    return is;
}

void fin(const char* str){
    std::cout << str << std::endl;
    exit(0);
}

// end of mylib.h

using namespace std;

VV<bool> prodOR(VV<bool> A, VV<bool> B){
    int a = A.size(), b = B.size(), c = B.front().size();
    VV<bool> X(a, V<bool>(c, false));
    for (int i = 0; i < a;++i){
        for (int j = 0; j < b; ++j) {
            for (int k = 0; k < c; ++k) {
                X[i][k] = X[i][k] || (A[i][j] && B[j][k]);
            }
        }
    }
    return X;
}

int main() {
    int v, d;
    cin >> v >> d;
    V<string> input(v);
    VV<bool> e(v, V<bool>(v, false)), t, res = e;
    for (int i = 0; i < v; ++i) res[i][i] = true;
    cin >> input;
    for (int i = 0; i < v;++i){
        for (int j = 0; j < v;++j){
            e[i][j] = (input[i][j] == '1');
        }
    }
    t = e;
    while(d > 0) {
        if (d & 1) res = prodOR(res, t);
        d /= 2;
        t = prodOR(t, t);
    }

    cerr << res << endl;

    for(auto vb : res)for(auto i:vb)
            if (!i) return cout << "No" << endl, 0;
    cout << "Yes" << endl;
}