7129 | 2023. 12. 31 12:01:38 | xxx | Parti (75 pont) | cpp17 | Elfogadva 75/75 | 32ms | 6772 KiB |
#include <bits/stdc++.h>
using namespace std;
int main() {
ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
int n;
cin >> n;
vector<pair<int, int> > a(n+1);
vector<int> b(n+1);
for(int i = 1; i <= n; i++) {
int x, y;
cin >> x >> y;
b[x]++, b[y]++;
a[i] = {x, y};
}
queue<int> q;
for(int i = 1; i <= n; i++) {
if (b[i] < 2) q.push(i);
}
while(!q.empty()) {
int t = q.front();
q.pop();
if (b[a[t].first] == 2) {
b[a[t].first]--;
q.push(a[t].first);
} else if (b[a[t].first] > 2) {
b[a[t].first]--;
}
if (b[a[t].second] == 2) {
b[a[t].second]--;
q.push(a[t].second);
} else if (b[a[t].second] > 2) {
b[a[t].second]--;
}
}
vector<int> ans;
for(int i = 1; i <= n; i++) if (b[i] > 1) ans.push_back(i);
cout << ans.size() << '\n';
for(int x : ans) cout << x << ' ';
cout << '\n';
return 0;
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 75/75 | ||||||
1 | Elfogadva | 0/0 | 3ms | 1824 KiB | |||
2 | Elfogadva | 0/0 | 17ms | 3808 KiB | |||
3 | Elfogadva | 3/3 | 3ms | 2128 KiB | |||
4 | Elfogadva | 3/3 | 3ms | 2332 KiB | |||
5 | Elfogadva | 3/3 | 3ms | 2416 KiB | |||
6 | Elfogadva | 3/3 | 3ms | 2644 KiB | |||
7 | Elfogadva | 3/3 | 3ms | 2856 KiB | |||
8 | Elfogadva | 4/4 | 3ms | 2856 KiB | |||
9 | Elfogadva | 4/4 | 3ms | 2856 KiB | |||
10 | Elfogadva | 4/4 | 3ms | 3220 KiB | |||
11 | Elfogadva | 4/4 | 3ms | 3176 KiB | |||
12 | Elfogadva | 4/4 | 3ms | 3196 KiB | |||
13 | Elfogadva | 4/4 | 3ms | 3288 KiB | |||
14 | Elfogadva | 4/4 | 4ms | 3232 KiB | |||
15 | Elfogadva | 4/4 | 17ms | 4992 KiB | |||
16 | Elfogadva | 4/4 | 19ms | 4920 KiB | |||
17 | Elfogadva | 4/4 | 23ms | 5204 KiB | |||
18 | Elfogadva | 4/4 | 26ms | 5476 KiB | |||
19 | Elfogadva | 4/4 | 28ms | 6100 KiB | |||
20 | Elfogadva | 4/4 | 30ms | 6520 KiB | |||
21 | Elfogadva | 4/4 | 32ms | 6772 KiB | |||
22 | Elfogadva | 4/4 | 3ms | 3636 KiB |