#include<stdio.h>
void main(){
   int n,m;
   scanf("%d%d",&n,&m);
   int a[n];
   int i;
   int judg=0,sum=0;;
   for(i=0;i<n;i++){
      scanf("%d",&a[i]);
      sum=sum+a[i];
   }
   for(i=0;i<m;i++){
      if(a[i]<sum*1/(4*m)){
         judg++;
      }
   }
   if(judg==0){
      printf("Yes");
   }else{
      printf("No");
   }
}
      
