이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
int n,m,x,k,l,r;
int cnt=0;
int nr[100001];
bool is[100001];
int rez[100001];
vector<int> v1[100001];
vector<int> v2[100001];
queue<int> q;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
cin >> n >> m;
for(int i=1;i<=m;i++)
{
cin >> x;
is[x]=1;
rez[++cnt]=x;
}
cin >> k;
for(int i=1;i<=k;i++)
{
cin >> l >> r;
for(int j=1;j<=l;j++)
{
cin >> x;
if(!is[x])
{
nr[i]++;
v1[x].push_back(i);
}
}
for(int j=1;j<=r;j++)
{
cin >> x;
if(!is[x])
{
v2[i].push_back(x);
}
}
if(!nr[i])q.push(i);
}
while(!q.empty())
{
int cur=q.front();
q.pop();
for(auto node : v2[cur])
{
if(!is[node])
{
is[node]=1;
rez[++cnt]=node;
for(auto react : v1[node])
{
nr[react]--;
if(!nr[react])q.push(react);
}
}
}
}
sort(rez+1,rez+cnt+1);
cout << cnt <<'\n';
for(int i=1;i<=cnt;i++)
{
cout << rez[i]<<' ';
}
return 0;
}
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