#include<stdio.h>
int main(){
   int n,m;
   scanf("%d %d",&n,&m);
   int a[n];
   int i;
   double sum=0;
   int count=0;
   for(i=0;i<n;i++){
      scanf("%d",&a[i]);
      sum+=a[i];
   }
   double x=sum/(4*m);
   for(i=0;i<n;i++){
      if(a[i]>=x){
         count++;
      }
   }
   if(count>=m){
      printf("Yes");

   }else{
      printf("No");
   }

   return 0;
   
}
