#include <iostream>
#include <vector>
#include <algorithm>
#include <numeric>

using namespace std;

int main(void) {
    int n, m, sum = 0, vote;
    cin >> n >> m;

    vector<int> a(n);

    for(int i = 0; i < n; i++) {
        cin >> a[i];
        sum += a[i];
    }
    vote = sum / (4*m);

    sort(a.begin(), a.end(), greater<int>());

    int flag = 0;
    for(int i = 0; i < m; i++) {
        if(a[i] < vote) flag = 1;
    }

    if(flag) cout << "No" << endl;
    else cout << "Yes" << endl;
}
