Submission #658378

#	Time	Username	Problem	Language	Result	Execution time	Memory
658378		sam571128	Logičari (COCI21_logicari)	C++17	10 / 110	33 ms	6928 KiB

Main

#include <bits/stdc++.h>

#define fastio ios_base::sync_with_stdio(0); cin.tie(0);
#define int long long

using namespace std;

const int N = 1e5+5;
vector<int> adj[N];

signed main(){
	fastio
	int n;
	cin >> n;
	for(int i = 1;i <= n;i++){
		int u,v;
		cin >> u >> v;
		adj[u].push_back(v);
		adj[v].push_back(u);
	}

	cout << (n%4==0 ? 2*n/4 : -1) << "\n";
}

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