7161 | 2024. 01. 01 09:39:56 | MagyarKendeSZLG | Parti (75 pont) | cpp17 | Elfogadva 75/75 | 34ms | 6684 KiB |
#include <bits/stdc++.h>
#define speed cin.tie(0); ios::sync_with_stdio(0)
#define cinv(v) for (auto& e : v) cin >> e;
#define all(v) v.begin(), v.end()
#define has(s, e) s.count(e)
using namespace std;
using ll = long long;
using point = array<int, 2>;
int main() {
speed;
int N;
cin >> N;
vector<point> g(N + 1);
vector<int> indegS(N + 1);
for (int i = 1; i <= N; i++) {
int U, V;
cin >> U >> V;
g[i][0] = U;
g[i][1] = V;
indegS[U]++;
indegS[V]++;
}
queue<int> q;
for (int i = 1; i <= N; i++) {
if (indegS[i] < 2) {
q.push(i);
}
}
while (!q.empty()) {
int node = q.front();
q.pop();
for (int i = 0; i < 2; i++) {
int next = g[node][i];
if (--indegS[next] == 1) {
q.push(next);
}
}
}
vector<int> result;
for (int i = 1; i <= N; i++) {
if (indegS[i] >= 2) {
result.push_back(i);
}
}
cout << result.size() << '\n';
for (int n : result) cout << n << ' ';
cout << '\n';
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 75/75 | ||||||
1 | Elfogadva | 0/0 | 3ms | 1828 KiB | |||
2 | Elfogadva | 0/0 | 18ms | 3852 KiB | |||
3 | Elfogadva | 3/3 | 3ms | 2272 KiB | |||
4 | Elfogadva | 3/3 | 3ms | 2480 KiB | |||
5 | Elfogadva | 3/3 | 3ms | 2852 KiB | |||
6 | Elfogadva | 3/3 | 3ms | 2952 KiB | |||
7 | Elfogadva | 3/3 | 3ms | 3124 KiB | |||
8 | Elfogadva | 4/4 | 3ms | 3084 KiB | |||
9 | Elfogadva | 4/4 | 3ms | 3376 KiB | |||
10 | Elfogadva | 4/4 | 3ms | 3252 KiB | |||
11 | Elfogadva | 4/4 | 3ms | 3272 KiB | |||
12 | Elfogadva | 4/4 | 3ms | 3220 KiB | |||
13 | Elfogadva | 4/4 | 4ms | 3236 KiB | |||
14 | Elfogadva | 4/4 | 4ms | 3288 KiB | |||
15 | Elfogadva | 4/4 | 17ms | 4864 KiB | |||
16 | Elfogadva | 4/4 | 20ms | 5144 KiB | |||
17 | Elfogadva | 4/4 | 24ms | 5428 KiB | |||
18 | Elfogadva | 4/4 | 27ms | 5668 KiB | |||
19 | Elfogadva | 4/4 | 30ms | 6152 KiB | |||
20 | Elfogadva | 4/4 | 34ms | 6304 KiB | |||
21 | Elfogadva | 4/4 | 34ms | 6684 KiB | |||
22 | Elfogadva | 4/4 | 3ms | 3452 KiB |