Submission #656231

#	Time	Username	Problem	Language	Result	Execution time	Memory
656231		Hydroxic_Acid	Logičari (COCI21_logicari)	C++17	0 / 110	3 ms	3028 KiB

Main

#include <iostream>
#include <cstring>
#include <vector>
using namespace std;

int N;
vector<int> adjl[100005];
bool visited[100005];
int see[100005];

int main(){
    freopen("test.txt", "r", stdin);
    cin >> N;

    for(int i = 0; i < N; i++){
        int a, b; cin >> a >> b;
        adjl[a].push_back(b);
        adjl[b].push_back(a);
    }

    memset(visited, false, sizeof(visited));
    memset(see, 0, sizeof(see));

    if(N % 4) cout << -1;
    else cout << N /2;
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:12:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |     freopen("test.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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