#include<stdio.h>


int main(void){
   int N,M,i;
   int sum,count=0;
   int data[100];
   scanf("%d %d",&N,&M);

   for(i=0;i<N;i++){
      scanf("%d",&data[i]);
      sum+=data[i];
   }
 
   sum=sum/(4*M);
   for(i=0;i<N;i++){
      if(sum<=data[i]){
         count+=1;
      }
   }
      if(M<=count){
         printf("Yes\n");
      }else{
         printf("No\n");
      }
   return 0;
}
