#include <stdio.h>

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