#include <stdio.h>
 
int main() {
    int n, m, x;
    int votos[100];
    int t = 0;
    int v = 0;
    
    scanf("%d%d", &n, &m);
    
    for (int i = 0; i < n; ++i) {
        scanf("%d", &x);
        votos[i] = x;
        t += x;
    }
    
    for (int i = 0; i < n; ++i) {
        double m = m;
        double t = t;
        if (votos[i] > t / (4 * m))
            v += 1;
    }      
    if (v >= m)
        printf("Yes\n");
    else
        printf("No\n");
        
    return 0;
}