7123 | 2023. 12. 31 10:09:39 | MagyarKendeSZLG | Legtávolabbi leszármazott | cpp17 | Elfogadva 50/50 | 39ms | 14124 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;
vector<vector<int>> g;
vector<bool> has_father;
int N;
cin >> N;
g.resize(N + 1);
has_father.resize(N + 1);
for (int i = 1; i < N; i++) {
int U, V;
cin >> U >> V;
g[U].push_back(V);
has_father[V] = 1;
}
int root;
for (int i = 1 ; i <= N; i++) {
if (!has_father[i]) {
root = i;
break;
}
}
queue<int> q;
q.push(root);
int next;
while (!q.empty()) {
next = q.front();
q.pop();
for (int son : g[next]) {
q.push(son);
}
}
cout << next;
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 50/50 | ||||||
1 | Elfogadva | 0/0 | 3ms | 1828 KiB | |||
2 | Elfogadva | 0/0 | 32ms | 9244 KiB | |||
3 | Elfogadva | 1/1 | 3ms | 2268 KiB | |||
4 | Elfogadva | 3/3 | 3ms | 2320 KiB | |||
5 | Elfogadva | 3/3 | 3ms | 2540 KiB | |||
6 | Elfogadva | 1/1 | 3ms | 2568 KiB | |||
7 | Elfogadva | 1/1 | 3ms | 2776 KiB | |||
8 | Elfogadva | 1/1 | 3ms | 3156 KiB | |||
9 | Elfogadva | 2/2 | 37ms | 11292 KiB | |||
10 | Elfogadva | 3/3 | 37ms | 11568 KiB | |||
11 | Elfogadva | 3/3 | 3ms | 3772 KiB | |||
12 | Elfogadva | 4/4 | 39ms | 12448 KiB | |||
13 | Elfogadva | 4/4 | 37ms | 12684 KiB | |||
14 | Elfogadva | 3/3 | 6ms | 4648 KiB | |||
15 | Elfogadva | 3/3 | 37ms | 12640 KiB | |||
16 | Elfogadva | 3/3 | 34ms | 11996 KiB | |||
17 | Elfogadva | 3/3 | 37ms | 11992 KiB | |||
18 | Elfogadva | 4/4 | 27ms | 10508 KiB | |||
19 | Elfogadva | 4/4 | 32ms | 11080 KiB | |||
20 | Elfogadva | 4/4 | 39ms | 14124 KiB |