#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef unsigned long long ull;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> P;

const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

ll gcd(ll a, ll b) {
	if (b == 0) return a;
	return gcd(b, a % b);
}

int main() {
	ll n;
	cin >> n;
	
	ll sum = (1 + n) * n / 2;
	ll ans = sum;
	
	random_device rndd;
	mt19937 mt(rndd());
	uniform_int_distribution<> rnd(2, INT_MAX);
	
	REP(i, 1000000) {
		ans = gcd(ans, sum + (rnd(mt) - 1) * n);
	}
	
	cout << ans << endl;
	return 0;
}