8995 | 2024. 02. 11 00:27:42 | xxx | Testnevelés óra | cpp17 | Elfogadva 50/50 | 219ms | 25916 KiB |
#include <bits/stdc++.h>
using namespace std;
const int mxN = 2 * (1e5 + 1);
vector<vector<int> > adj(mxN);
int in[mxN];
int main() {
int n, m;
cin >> n >> m;
for(int i = 0; i < m; i++) {
int x, y;
cin >> x >> y;
adj[x].push_back(y);
in[y]++;
}
vector<int> top;
queue<int> q;
for(int i = 1; i <= n; i++) {
if (in[i] == 0) {
top.push_back(i);
q.push(i);
}
}
int ind, cntv = 0;
bool flag = false;
if(top.size() > 1) {
flag = true;
ind = 1;
}
while(!q.empty()) {
int v = q.front();
q.pop();
int cnt = 0;
cntv++;
for(int u : adj[v]) {
in[u]--;
if (in[u] == 0) {
q.push(u);
top.push_back(u);
cnt++;
}
}
if (cnt >= 2) {
flag = true;
ind = top.size()-1;
}
}
if (cntv < n) {
cout << "0\n";
return 0;
}
if (flag) {
cout << "2\n";
for(int x : top) {
cout << x << ' ';
}
cout << endl;
swap(top[ind], top[ind-1]);
for(int x : top) {
cout << x << ' ';
}
cout << endl;
} else {
cout << "1\n";
for(int x : top) {
cout << x << ' ';
}
cout << endl;
}
return 0;
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 50/50 | ||||||
1 | Elfogadva | 0/0 | 6ms | 11032 KiB | |||
2 | Elfogadva | 0/0 | 6ms | 11296 KiB | |||
3 | Elfogadva | 0/0 | 179ms | 18424 KiB | |||
4 | Elfogadva | 2/2 | 6ms | 11296 KiB | |||
5 | Elfogadva | 3/3 | 6ms | 11552 KiB | |||
6 | Elfogadva | 3/3 | 6ms | 11748 KiB | |||
7 | Elfogadva | 3/3 | 6ms | 11964 KiB | |||
8 | Elfogadva | 1/1 | 7ms | 12172 KiB | |||
9 | Elfogadva | 3/3 | 6ms | 12432 KiB | |||
10 | Elfogadva | 3/3 | 8ms | 12616 KiB | |||
11 | Elfogadva | 3/3 | 8ms | 12600 KiB | |||
12 | Elfogadva | 1/1 | 7ms | 12608 KiB | |||
13 | Elfogadva | 2/2 | 7ms | 12580 KiB | |||
14 | Elfogadva | 3/3 | 8ms | 12668 KiB | |||
15 | Elfogadva | 1/1 | 158ms | 18144 KiB | |||
16 | Elfogadva | 3/3 | 135ms | 22812 KiB | |||
17 | Elfogadva | 5/5 | 59ms | 16140 KiB | |||
18 | Elfogadva | 1/1 | 219ms | 24544 KiB | |||
19 | Elfogadva | 2/2 | 160ms | 18496 KiB | |||
20 | Elfogadva | 3/3 | 172ms | 25792 KiB | |||
21 | Elfogadva | 4/4 | 181ms | 25916 KiB | |||
22 | Elfogadva | 4/4 | 180ms | 25912 KiB |