#include <stdio.h>
void main (){
  int n,m,arry[100],sum,vote;
  scanf("%d",&n);
  scanf("%d",&m);
  int i=0;
  sum=0;
  for(i=0;i<n;i++){
    scanf("%d",arry+i);
    sum+=arry[i];
  }
  vote=sum/(4*m);
  sum=0;
  for(i=0;i<n;i++){
    if(vote<arry[i])sum+=1;
  }
  if(sum>=m)printf("Yes");
  else printf("No");
}