#include<stdio.h>

int main() {
   int i,n,m;
   int sum = 0,count = 0;
   int a[1000];
   scanf("%d %d",&n,&m);
   for(i = 0;i < n;i++) {
     scanf("%d",&a[i]);
     sum += a[i];
   }
   for(i = 0;i < m;i++) {
     if(a[i] >= sum/(4*m)) {
       count++;
     }
   }
   if(count == m) {
     printf("Yes\n");
   } else {
     printf("No\n");
   }

}
