3. Count BSTs #

Created Saturday 18 July 2020

// main
#include <cmath>
#include <cstdio>
#include <iostream>
#include <algorithm>
using namespace std;
#include "solution.h"
int main()
{
	int n ;
	cin>>n;
	cout<<countBST(n);
	return 0;
}
//your
int countBST( int n)
{
  /* Don't write main().
     * Don't read input, it is passed as function argument.
     * Return output and don't print it.
     * Taking input and printing output is handled automatically.
     */
}