Submission #864961

#	Time	Username	Problem	Language	Result	Execution time	Memory
864961		epicci23	Logičari (COCI21_logicari)	C++17	10 / 110	18 ms	1576 KiB

Main

#include "bits/stdc++.h"
using namespace std;
#define int long long
#define endl '\n'
#define all(x) (x).begin(),(x).end()
#define pb push_back
#define sz(x) ((int)(x).size())

void solve(){
  int n;
  cin >> n;
  
  for(int i=1;i<=n;i++){
    int a,b;
    cin >> a >> b;
  }

  if(n&1){
    cout << -1 << endl;
    return;
  }

  if((n/2)&1){
    cout << -1 << endl;
    return;
  }

  cout << n/2 << endl;
}


int32_t main(){

  ios::sync_with_stdio(0);
  cin.tie(0);

  int t=1;//cin >> t;
  while(t--) solve();
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 40
• Subtask 4: 0 / 50