#include <stdio.h>

int main() {
    int n, m;
    int votos[105];
    int t = 0;
    
    scanf("%d%d", &n, &m);
    
    for (int i = 0; i < n; ++i) {
        int x;
        scanf("%d", &x);
        votos[i] = x;
        t += x;
    }
    
    int v = 0;
    
    for (int i = 0; i < n; ++i)
        if (votos[i] >= t / (4 * m))
            v += 1;
            
    if (v >= m)
        printf("Yes");
    else
        printf("No");
        
    return 0;
}