#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (ll i = a; i < b; i++)
using ll = long long;

int main(){
    int n, k;
    cin >> n >> k;
    vector<int> a(n);
    rep(i, 0, n) cin >> a[i];
    sort(a.rbegin(), a.rend());
    rep(i, 0, k) {
        if(a[i] < 30) {
            cout << "No" << endl;
            return 0;
        }
    }
    cout << "Yes" << endl;
}