#include <bits/stdc++.h>
using namespace std;
int main(){
	int k=0,o=1,l;
	cin>>k;
	int a=1;
	while(l>=k){
		a=a*o;
		a+1;
	o=a*k;
	}cout<<a;
	return 0;
}

/**************************************************************
	Problem: 1004
	User: tonghuawei
	Language: C++
	Result: Wrong Answer
****************************************************************/