#include <stdio.h>
int main(void){
    int n,m,a[100];
    int i,sum = 0;
    int count = 0;
    scanf("%d %d",&n,&m);
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
        sum = sum + a[i];
    }
    for(i=0;i<n;i++){
        if(sum <= a[i]*4*m){
          count++;
        }
    }
    if(count >= m){
        printf("Yes");
    }
    else printf("No");
    return 0;
}