#include <stdio.h>
int main(void){
    // Your code here!
    int n, m, i, a[10000], b=0, c=0;
    
    scanf("%d%d",&n,&m);
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
        b+=a[i];
    }
    
    for(i=0;i<n;i++){
       if(a[i]>=(b/(4*m))) c++;
    }
    
    if(c>=m) printf("Yes\n");
    else printf("No\n");
    return 0;
}
