#include <stdio.h>
#include <bits/stdc++.h>
#include "testlib.h"
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf 1000000001



int main(){
	
	registerValidation();
	
	int N;
	N = inf.readInt(2,500);
	inf.readEoln();
	
	inf.readEof();
	
	assert(N%2==0);
			
	return 0;
}