#include<stdio.h>
 
int main(){
  int n, m, count = 0, sum = 0, a[100];
  
  scanf("%d %d", &n, &m);
  for(int i=0;i<n;i++){
    scanf("%d", &a[i]);
  	sum += a[i];
  }
  
  for(int i=0;i<n;i++){
  	if(a[i] >= sum/4/m){
      count++;
    }
  }
  
  if(count >= m){
    printf("Yes");
  } else {
    printf("No");
  }
  
  return 0;
}