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