2046 | 2022. 12. 15 21:36:36 | TomaSajt | Testnevelés óra | cpp17 | Elfogadva 50/50 | 116ms | 27856 KiB |
#include <bits/stdc++.h>
#define speed ios::sync_with_stdio(0);cin.tie(0)
using namespace std;
int main() {
speed;
int n, k;
cin >> n >> k;
vector<vector<int>> g(n + 1);
vector<int> deps(n + 1);
while (k--) {
int u, v;
cin >> u >> v;
g[u].push_back(v);
deps[v]++;
}
queue<int> q;
for (int i = 1; i <= n; i++) {
if (deps[i] == 0) g[0].push_back(i), deps[i]++;
}
q.push(0);
int a = -1, b = -1;
vector<int> ord;
while (!q.empty()) {
int u = q.front(); q.pop();
if (u != 0) ord.push_back(u);
vector<int> nexts;
for (auto v : g[u]) {
if (--deps[v] == 0) nexts.push_back(v);
}
if (a == -1 && nexts.size() > 1) a = nexts[0], b = nexts[1];
for (auto v : nexts) q.push(v);
}
if (count(deps.begin() + 1, deps.end(), 0) != n) {
cout << '0';
return 0;
}
cout << (b == -1 ? 1 : 2) << '\n';
for (auto e : ord) cout << e << ' ';
cout << '\n';
if (b != -1) {
for (auto e : ord) cout << (e == a ? b : e == b ? a : e) << ' ';
cout << '\n';
}
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 50/50 | ||||||
1 | Elfogadva | 0/0 | 3ms | 1828 KiB | |||
2 | Elfogadva | 0/0 | 2ms | 2056 KiB | |||
3 | Elfogadva | 0/0 | 86ms | 14192 KiB | |||
4 | Elfogadva | 2/2 | 2ms | 2324 KiB | |||
5 | Elfogadva | 3/3 | 2ms | 2552 KiB | |||
6 | Elfogadva | 3/3 | 2ms | 2632 KiB | |||
7 | Elfogadva | 3/3 | 2ms | 2904 KiB | |||
8 | Elfogadva | 1/1 | 2ms | 3072 KiB | |||
9 | Elfogadva | 3/3 | 2ms | 3276 KiB | |||
10 | Elfogadva | 3/3 | 3ms | 3584 KiB | |||
11 | Elfogadva | 3/3 | 3ms | 3800 KiB | |||
12 | Elfogadva | 1/1 | 3ms | 3976 KiB | |||
13 | Elfogadva | 2/2 | 3ms | 3928 KiB | |||
14 | Elfogadva | 3/3 | 3ms | 4200 KiB | |||
15 | Elfogadva | 1/1 | 68ms | 11884 KiB | |||
16 | Elfogadva | 3/3 | 81ms | 20732 KiB | |||
17 | Elfogadva | 5/5 | 48ms | 22000 KiB | |||
18 | Elfogadva | 1/1 | 116ms | 27856 KiB | |||
19 | Elfogadva | 2/2 | 68ms | 12316 KiB | |||
20 | Elfogadva | 3/3 | 108ms | 24032 KiB | |||
21 | Elfogadva | 4/4 | 107ms | 24036 KiB | |||
22 | Elfogadva | 4/4 | 107ms | 24100 KiB |