1319 | 2022. 05. 13 16:31:43 | nkdorka1212 | Testnevelés óra | cpp11 | Elfogadva 50/50 | 164ms | 38056 KiB |
#include <bits/stdc++.h>
using namespace std;
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
int n,k;
vector<int>befok;
vector<vector<int>>g;
vector<bool>vis;
vector<int>mo;
int db=0;
bool ketto=false;
int l,r;
int bfs()
{
queue<int>q;
for(int i=1;i<=n;i++)
{
if(befok[i]==0)
{
q.push(i);
mo.push_back(i);
}
}
if(q.size()==0)
{
return -1;
}else
{
if(q.size()>=2)
{
ketto=true;
l=0,r=1;
}
while(!q.empty())
{
int v=q.front();
q.pop();
//mo.push_back(v);
int db1=0;
for(int x:g[v])
{
befok[x]--;
if(befok[x]==0 && !vis[x])
{
q.push(x);
vis[x]=true;
db1++;
mo.push_back(x);
if(db1>1 && !ketto)
{
ketto=true;
l=mo.size()-2;
r=mo.size()-1;
}
}
}
db++;
}
if(db<n)
{
return -1;
}
if(!ketto)
{
return 1;
}
return 2;
}
}
int main()
{
ios::sync_with_stdio(false);
cin.tie(nullptr);
cin>>n>>k;
befok.resize(n+1,0);
g.resize(n+1);
vis.resize(n+1,0);
db=0;
for(int i=1;i<=k;i++)
{
int u,v;
cin>>u>>v;
g[u].push_back(v);
befok[v]++;
}
int m=bfs();
if(m==-1)
{
cout<<0<<'\n';
}else if(m==1)
{
cout<<1<<'\n';
for(int x:mo)
{
cout<<x<<" ";
}
}else
{
cout<<2<<'\n';
for(int x:mo)
{
cout<<x<<" ";
}
cout<<'\n';
for(int i=0;i<=n-1;i++)
{
if(i!=l && i!=r)
{
cout<<mo[i]<<" ";
}else if(i==l)
{
cout<<mo[r]<<" ";
}else if(i==r)
{
cout<<mo[l]<<" ";
}
}
}
return 0;
}
Részfeladat | Összpont | Teszt | Verdikt | Idő | Memória | ||
---|---|---|---|---|---|---|---|
base | 50/50 | ||||||
1 | Elfogadva | 0/0 | 4ms | 1796 KiB | |||
2 | Elfogadva | 0/0 | 1ms | 1820 KiB | |||
3 | Elfogadva | 0/0 | 107ms | 15736 KiB | |||
4 | Elfogadva | 2/2 | 1ms | 4164 KiB | |||
5 | Elfogadva | 3/3 | 1ms | 4172 KiB | |||
6 | Elfogadva | 3/3 | 1ms | 4180 KiB | |||
7 | Elfogadva | 3/3 | 1ms | 4180 KiB | |||
8 | Elfogadva | 1/1 | 1ms | 4180 KiB | |||
9 | Elfogadva | 3/3 | 1ms | 4188 KiB | |||
10 | Elfogadva | 3/3 | 2ms | 4348 KiB | |||
11 | Elfogadva | 3/3 | 2ms | 4292 KiB | |||
12 | Elfogadva | 1/1 | 2ms | 4312 KiB | |||
13 | Elfogadva | 2/2 | 3ms | 4344 KiB | |||
14 | Elfogadva | 3/3 | 2ms | 4364 KiB | |||
15 | Elfogadva | 1/1 | 75ms | 14192 KiB | |||
16 | Elfogadva | 3/3 | 119ms | 23804 KiB | |||
17 | Elfogadva | 5/5 | 52ms | 22304 KiB | |||
18 | Elfogadva | 1/1 | 146ms | 31860 KiB | |||
19 | Elfogadva | 2/2 | 86ms | 20872 KiB | |||
20 | Elfogadva | 3/3 | 158ms | 34360 KiB | |||
21 | Elfogadva | 4/4 | 164ms | 36220 KiB | |||
22 | Elfogadva | 4/4 | 128ms | 38056 KiB |