제출 #656222

#제출 시각아이디문제언어결과실행 시간메모리
656222Hydroxic_AcidLogičari (COCI21_logicari)C++17
0 / 110
1 ms296 KiB
#include <iostream>
using namespace std;

int N;

int main(){
    cin >> N;

    if(N % 2) cout << -1;
    else cout << N / 2;
}
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