#include <stdio.h>

int main(void){
  int n,m,sum=0,count=0;
  scanf("%d %d",&n,&m);
  
  int a[1000];
  for(int i=0;i<n;i++){
    scanf("%d",&a[i]);
    sum+=a[i];
  }
  
  for(int i=0;i<n;i++){
    if(a[i] >= sum/(4*m)) count++;
  }
  
  if(count>m){
    puts("Yes");
  }else{
    puts("No");
  }
  
  return 0;
}