int main(void) {
   int n, m;
   int i;
   int sum = 0;
   int cnt = 0;
   int com;
   scanf("%d %d",&n, &m);

   int an[n];
   for(i = 0; i < n; i++) {
      scanf("%d",&an[i]);
      sum += an[i];
   }

   com = sum/(4*m);

   for(i = 0; i < n; i++) {
      if(sum <= an[i]*4*m) {
         cnt++;
      }
   }
   if(cnt >= m) {
      printf("Yes");
   } else {
      printf("No");
   }

   return 0;
}

