Submission #643988

#	Time	Username	Problem	Language	Result	Execution time	Memory
643988		elif	Logičari (COCI21_logicari)	C++17	10 / 110	15 ms	1484 KiB

Main

#include <bits/stdc++.h>
using namespace std;

int main(){

	ios_base::sync_with_stdio(0);

	int n;
	cin >> n;
	for(int i=0; i<n; i++){
		int u, v;
		cin >> u >> v;
	}

	if(n % 4)
		cout << -1 << endl;

	else cout << n/2 << endl;


	return 0;
}

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