#include <stdio.h>


int n, m, count;
float a[1005];

void solve() {
    int ans=0;
    float b=0.25*m;
    for (int i = 0; i < n; i++) {
        if (a[i]>=b) ans++;
        if (ans>=m) {
            printf("Yes");
            break;
        }
    }
    if (ans<m) printf("No");
}

int main () {
    scanf("%d%d", &n, &m);
    for(int i=0;i<n;i++) {
        scanf("%d",&a[i]);
        count+=a[i];
    }
    solve();
}