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