#include <stdio.h>

int main () {
  int N, M;
  int A[100];
  
  scanf("%d %d", &N, &M);
  for (int i = 0;i < N; i++)
    scanf("%d", &A[i]);
  
  
  int total = 0;
  for (int i = 0;i < N; i++)
    total = total + A[i];
  
  int count = 0;
  for (int i = 0;i < N; i++)
  {
    if (A[i] >= total / (4 * M))
      count = count + 1;
  }
  
  if (count >= M)
    printf("Yes\n");
  else
    printf("No\n");
  
  return 0;
}