#include <stdio.h>
int main(void){
  int n,m;  
  scanf("%d %d",&n,&m);
  
  int a[n];
  int wa = 0;
  int max = 0;
  
  for(int i = 0;i < n;i++){
    scanf("%d",&a[i]);
    wa += a[i];
  }
  
  for(int i = 1;i < n;i++){
    for(int j = n-1;j => i;j--){
      if(a[j] > a[j-1]){
        int temp = a[j];
        a[j] = a[j-1];
        a[j-1] = temp;
      }
    }
  }
  
  if(a[m-1] >= wa/4/m)
    printf("Yes");
  else
    printf("No");
  
  return 0;
}