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 <bits/stdc++.h>
#define endl '\n'
#define mp make_pair
#define pb push_back
#define f first
#define s second
#define fo(i,n) for(auto i =0 ; i < n;i++)
#define fore(i,l,r) for(auto i = l; i < r;i++)
#define forex(i,r,l) for(auto i = r; i >= l; i--)
#define ffo(i,n) forex(i,n-1,0)
#define all(x) x.begin(),x.end()
#define lsb(x) x&(-x)
#define sz(x) (int)x.size()
#define gcd(a,b) __gcd(a,b)
#define vii vector<ii>
using namespace std;
using ll = long long; using ull = unsigned long long;
using vi = vector<int>;using ii = pair<int,int>;using mii = map<int,int>;
// #pragma GCC target ("avx2")
// #pragma GCC optimization ("O3")
// #pragma GCC optimization ("unroll-loops")
// bool are_connected(vi A, vi B);
const int N = 9;
vi graph[N];vi res,c,p;
vi dfs(int nodo){
// cout << nodo << endl; cout.flush();
vi hijos;hijos.pb(nodo);
for(int v :graph[nodo]){
vi act = dfs(v);
for(int v :act)hijos.pb(v);
}
sort(all(hijos));
// cout << "Nodo " << nodo << endl;
// for(auto v: hijos) cout << v << " ";cout<<endl;
do{
// vi acabe = hijos;reverse(all(acabe));
// if(is_sorted(all(acabe)))break;
vi cn(505, 0);
bool no = 1;
if(hijos[0] != nodo) no = 0;
else{
fore(i,1,sz(hijos)){
if(hijos[cn[c[hijos[i]]]] != p[i]){no=0;break;}
cn[c[hijos[i]]] ++;
}
}
if(no){res[nodo] = 1; break;}
}while(std::next_permutation(all(hijos)));
return hijos;
}
vi beechtree(int n, int m, vi P, vi C){c=C;p=P;
res.resize(n,0);
fore(i,1,n){
graph[p[i]].pb(i);
}
dfs(0);
return res;
}
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