#include<stdio.h>
int main(){
  int n,m,i,d[100010],c=0,s=0;
  scanf("%d %d",&n,&m);
  for(i=0;i<n;i++){
    scanf("%d",&d[i]);
    s+=d[i];
  }
  for(i=0;i<n;i++){
    if(d[i]>=s/4/m)c++;
  }
  printf("%s\n",c<m?"No":"Yes");
  return 0;
}
