This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<iostream>
#include<algorithm>
#include<queue>
using namespace std;
int poz,n,m,a,i,j,k,l,p,sol[100001],r,f[100001],nr[100001];
vector<int> ans[100001],v[100001];
queue<int> q;
int main(){
cin>>n>>m;
for(i=1;i<=m;i++){
cin>>a;
f[a]=1;
sol[++p]=a;
}
cin>>k;{
for(i=1;i<=k;i++)
cin>>l>>r;
for(j=1;j<=l;j++){
cin>>a;
if(f[a]==0){
nr[i]++;
v[a].push_back(i);
}
}
for(j=1;j<=r;j++)
{
cin>>a;
if(f[a]==0)
ans[i].push_back(a);
}
if(nr[i]==0)
q.push(i);
}
while(!q.empty()){
poz=q.front();
q.pop();
for(auto it:ans[poz])
if(f[it]==0){
f[it]=1;sol[++p]=it;
for(auto IT:v[it]){
nr[IT]--;
if(nr[IT]==0)
q.push(IT);
}
}
}
sort(sol+1,sol+p+1);
cout<<p<<"\n";
for(i=1;i<=p;i++)
cout<<sol[i]<<" ";
return 0;
}
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