#include <stdio.h>

int main(){
  int i,n,m,sum=0,count=0;
  scanf("%d %d",&n,&m);
  int a[n];
  for(i=0;i<n;i++){
    scanf("%d",&a[i]);
    sum+=a[i];
  }
  for(i=0;i<n;i++){
    if(a[i]>=sum*0.25/m){
      count++;
    }
  }
  if(count>=m){
    printf("Yes\n");
  }else{
    printf("No\n");
  }
  return 0;
}