#include <stdio.h>

int main (){
  int n,m, a[101],b=0,d=0;

  scanf("%d %d\n", &n, &m );
  for (int i = 0; i < n; i++){
    scanf("%d", &a[i]);
    b+=a[i];
  }

  for (int i = 0; i < n; i++)
    if(a[i] >= b/(4*m) )
      d++;

  if(d>=m) printf("Yes\n");
  else printf("No\n");

  return 0;
}
