#include <stdio.h>

int main()
{
  int i, j;
  int n, m;
  int all_v = 0, count = 0;
  int a[100];
  
  scanf("%d%d", &n, &m);
  for(i = 0; i < n; i++){
    scanf("%d", &a[i]);
    all_v += a[i];
  }
  for(i = 0; i < n; i++){
  	if(a[i] >= (all_v / (4 * m))){
      count++;
  	}
  }
  if(count >= m){
    printf("Yes\n");
  }else{
    printf("No\n");
  }
  
  return 0;
}