Submission #1241563

#	Time	Username	Problem	Language	Result	Execution time	Memory
1241563		SalihSahin	Beech Tree (IOI23_beechtree)	C++20	Compilation error	0 ms	0 KiB

beechtree

#include "bits/stdc++.h"
#include "beechtree.h"
#define pb push_back
using namespace std;

const int N = 2e5 + 5;

vector<int> perm;
vector<pair<int, int> > edges;

void dfs(int node){
   perm.pb(node);
   for(auto itr: ch[node]){
      edges.pb(itr);
      dfs(itr.first);
   }
}

vector<int> beechtree(int N, int M, vector<int> P, vector<int> C){
   vector<int> cnt(M+1);

   vector<int> ans(N, 1);
   for(int i = 0; i < N; i++){
      perm.clear();
      edges.clear();
      dfs(i);
      sort(perm.begin(), perm.end());
      bool check = 0;
      vector<int> cnt(M);

      do{
         if(perm[0] != i) continue;
         vector<int> pos(N);
         for(int j = 0; j < perm.size(); j++){
            pos[perm[j]] = j;
         }

         bool yes = 1;
         for(int j = 1; j < perm.size(); j++){
            if(pos[P[perm[j]]] != cnt[C[perm[j]]]) yes = 0;
            cnt[C[perm[j]]]++;
         }

         check |= yes;
      }while(next_permutation(perm.begin(), perm.end()));

      ans[i] = check;
   }
   return ans;
}

Compilation message (stderr)

beechtree.cpp: In function 'void dfs(int)':
beechtree.cpp:13:18: error: 'ch' was not declared in this scope
   13 |    for(auto itr: ch[node]){
      |                  ^~