#include <bits/stdc++.h>
using namespace std;
int main() {
    int n, m;
    cin >> n >> m;
    vector<int> a(n);
    int sum = 0;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        sum += a[i];
        a[i] = 4*m * a[i];
    }
    int cnt = 0;
    for (int i = 0; i < n; i++) {
        if (a[i] > sum)
            cnt++;
    }
    if (cnt >= m)
        cout << "Yes" << '\n';
    else
        cout << "No" << '\n';
  
    return 0;
}