#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]);
  
  // calculate
  int total = 0;
  for (int i = 0; i < N; i++)
    total = total + A[i];

  // count selectable item
  int count = 0;
  for (int i = 0; i < N; i++)
  {
    if (A[i] >= total / (4.0 * M))
      count = count + 1;
  }  

  if (count >= M)
    printf("Yes\n");
  else
    printf("No\n");
  
  return 0;
}