#include<stdio.h>

int main(void){
   int n,m,i,count,sum;
   scanf("%d %d",&n,&m);
   int votes[n];

   sum=0;
   for(i=0;i<n;i++){
      scanf("%d",&votes[i]);
      sum+=votes[i];
   }
   count=0;
   for(i=0;i<n;i++){
      if(votes[i]>=sum/4*m){
         count++;
      }
   }
   if(count>m){
      printf("Yes\n");
   } else {
      printf("No\n");
   }

   return 0;
}
