#include<stdio.h>
int sort(int *a,int *b){
  return *b-*a;
}
int main(void){
  int n,m,sum=0,count=0;
  scanf("%d%d",&n,&m);
  int a[n];
  for(int i=0;i<n;i++){
scanf("%d",&a[i]);
    sum+=a[i];
  }
  
  qsort(a,n,sizeof(a[0]),sort);
  double x=(double)sum/4/m;

  for(int i=0;i<n;i++){
    if(a[i]>x)count++;
  }
if(count>=m)printf("Yes");
  else printf("No");
  return 0;
}