#include<stdio.h>

int main(){
   int n,m;
   scanf("%d %d", &n, &m);
   int a[n];
   int sum = 0;
   int count = 0;
   for(int i = 0; i < n; i++){
      scanf("%d", &a[i]);
      sum += a[i];
   }
   double x = sum/(4.0*m);

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