4408 | 2023. 03. 27 17:39:27 | horvathabel | Testnevelés óra | cpp17 | Elfogadva 50/50 | 252ms | 112732 KiB |
#include <bits/stdc++.h>
using namespace std;
vector<int> g[2000001];
int main() {
int n, m;
cin>>n>>m;
vector<int> c;
c.assign(n+1, 0);
for (int i=0; i<m;i++){
int x,y;
cin>>x>>y;
c[y]++;
g[x].push_back(y);
}
queue<int> q;
for (int i=1;i<=n;i++){
if (c[i]==0) q.push(i);
}
int cnt=0;
vector<int> ans;
pair<int, int> ans2;
bool van=false, volte=false;
while (!q.empty()){
cnt++;
if (q.size()>1 && !volte){
ans2.first=q.front();
van=true;
volte=true;
}
int v=q.front();
ans.push_back(v);
q.pop();
if (van){
ans2.second=q.front();
van=false;
}
for (int edge:g[v]){
c[edge]-=1;
if (c[edge]==0) q.push(edge);
}
}
if (cnt!=n){
cout<<0<<endl;
return 0;
}
if (!volte){
cout<<1<<endl;
for (int i:ans) cout<<i<<" ";
}
else{
cout<<2<<endl;
vector<int> mego;
for (int i=0; i<n;i++){
cout<<ans[i]<<" ";
if (ans[i]==ans2.first) mego.push_back(ans2.second);
else{
if (ans[i]==ans2.second) mego.push_back(ans2.first);
else mego.push_back(ans[i]);
}
}
cout<<endl;
for (int i:mego) cout<<i<<" ";
}
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 50/50 | ||||||
1 | Elfogadva | 0/0 | 35ms | 95700 KiB | |||
2 | Elfogadva | 0/0 | 45ms | 95952 KiB | |||
3 | Elfogadva | 0/0 | 211ms | 104040 KiB | |||
4 | Elfogadva | 2/2 | 46ms | 96168 KiB | |||
5 | Elfogadva | 3/3 | 37ms | 96420 KiB | |||
6 | Elfogadva | 3/3 | 35ms | 96412 KiB | |||
7 | Elfogadva | 3/3 | 35ms | 96632 KiB | |||
8 | Elfogadva | 1/1 | 35ms | 96840 KiB | |||
9 | Elfogadva | 3/3 | 45ms | 97060 KiB | |||
10 | Elfogadva | 3/3 | 39ms | 97224 KiB | |||
11 | Elfogadva | 3/3 | 37ms | 97444 KiB | |||
12 | Elfogadva | 1/1 | 46ms | 97736 KiB | |||
13 | Elfogadva | 2/2 | 46ms | 97948 KiB | |||
14 | Elfogadva | 3/3 | 37ms | 97904 KiB | |||
15 | Elfogadva | 1/1 | 206ms | 103216 KiB | |||
16 | Elfogadva | 3/3 | 168ms | 109304 KiB | |||
17 | Elfogadva | 5/5 | 100ms | 105316 KiB | |||
18 | Elfogadva | 1/1 | 252ms | 112720 KiB | |||
19 | Elfogadva | 2/2 | 185ms | 103556 KiB | |||
20 | Elfogadva | 3/3 | 219ms | 112716 KiB | |||
21 | Elfogadva | 4/4 | 204ms | 112696 KiB | |||
22 | Elfogadva | 4/4 | 222ms | 112732 KiB |