#include <stdio.h>
 int main(void){
   int n,m;
   int sum=0;
   int a[1000];
   int i,j;
   int tmp;
   int count=0;
   
   scanf("%d %d",&n,&m);
   for(i=0;i<n;i++){
     scanf("%d",&a[i]);
     sum=sum+a[i];
   }
   for(i=0;i<n;i++){
     for(j+i;j<n;++j){
       if(a[i]>a[j]){
         tmp = a[i];
        a[i] = a[j];
        a[j] = tmp;
       }
     }
   }
   
   if(a[m-1]>=sum/4*m)
     puts("Yes");
   else 
     puts("No");
   
   return 0;
 }
     
