#include<stdio.h>
int main(){
  int n,m,i;
  int a_score = 0;
  int c = 0;
  int bkb;
  int a[101] = {};
  scanf("%d %d", &n, &m);
  for(i=0;i<n;i++){
    scanf("%d", &a[i]);
    a_score += a[i];
  }
  for(i=0;i<n;i++){
    bkb = a[i]*4*m
    if(bkb >= a_score)
      c++;
  }
  if(c >= m){
    printf("Yes\n");
  }else{
    printf("No\n");
  }
  return 0;
}