제출 #1111295

#제출 시각아이디문제언어결과실행 시간메모리
1111295ezzzayLogičari (COCI21_logicari)C++14
0 / 110
1 ms336 KiB
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define ff first
#define ss second
#define pb push_back
signed main(){
    int n;
    cin>>n;
    if(n==3){
        cout<<-1;
        return 0;
    }
    if(n%2){
        cout<<n/2+1;
        return 0;
    }
    cout<<n/2;
}
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