Submission #53827436

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Source Code Expand

// #pragma GCC optimize("Ofast,unroll-loops")
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define inf (ll)1e18
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define fi first
#define se second
#define lll __int128
const int N = 1e6 + 5;

void solve() {
	ll a, b;
	cin >> a >> b;
	set<ll> s;
	for (ll i = 1; i <= 3; i++) {
		if (i != a && i != b)
			s.insert(i);
	}
	cout << (s.size() == 1 ? *s.begin() : -1) << endl;
}

int main() {
	ios::sync_with_stdio(false);
  	cin.tie(0);
  	cout.tie(0);
	solve();
	return 0;
}

Submission Info

Judge Result