제출 #879238

#제출 시각아이디문제언어결과실행 시간메모리
879238vjudge1Logičari (COCI21_logicari)C++17
0 / 110
1 ms348 KiB
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e5 + 10, MOD = 998244353;

int n;
void test(){
    cin >> n;
    cout << (n & 1 ? -1:n / 2);
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int T = 1;
    // cin >> T;
    for (int i = 1; i <= T; i++)
    {
        test();
    }
}
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