#include<stdio.h>
signed main(){
   int a[10000];
   int n,m;
   scanf("%d %d",&n,&m);
   int i,sum=0;
   for(i=0;i<n;i++){
       scanf("%d",&a[i]);
       sum+=a[i];
   }
   int line=sum/(4*m),c=0;
   for(i=0;i<n;i++){
       if(a[i]>=line){
           c++;
       }
   }
   if(c>=m){
       printf("Yes\n");
   }else{
       printf("No\n");
   }
    return(0);
}