#include<stdio.h>

int main() {
   int N,M;
   int sum = 0;
   int cnt = 0;
   int com;
   scanf("%d %d",&N, &M);
 
   int array[N];
   for(int i = 0; i < N; i++) {
      scanf("%d",&array[i]);
      sum += array[i];
   }
 
   com = sum/(4*M);
 
   for(int i = 0; i < N; i++) {
      if(sum <= array[i]*4*M) {
         cnt++;
      }
   }
   if(cnt >= M) {
      printf("Yes\n");
   } else {
      printf("No\n");
   }
 
   return 0;
}
