#include <stdio.h>

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

  scanf("%d %d\n", &n, &m );
  for (int i = 0; i < n; i++){
    scanf("%d", &a[i]);
    b+=a[i];
  }
  c=b/(4*m);
  printf("c: %d\n",c);

  for (int i = 0; i < n; i++){
    if(a[i] >= c ){
      d++;
      //printf("d: %d\n",d);
    }
  }

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

  return 0;
}
