제출 #1061911

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1061911		mychecksedad	참나무 (IOI23_beechtree)	C++17	0 / 100	30 ms	10472 KiB

beechtree

#include "beechtree.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define all(x) x.begin(),x.end()
#define ll long long
#define ff first
#define ss second
#define vi vector<int>
const int N = 3005;
const ll INF = 1e18;

vector<int> g[N], s[N];
vi res;
int antidep[N], col[N], n, m, par[N];
bool ok = 1;
void dfs(int v){
  set<int> s;
  antidep[v] = 0;
  int co = 0, node;
  for(int u: g[v]){
    dfs(u);
    par[u] = v;
    s.insert(col[u]);
    antidep[v] = max(antidep[u] + 1, antidep[v]);
    if(g[u].size() > 0) co++, node = u;
  }

  // cout << v << ' ' << antidep[v] << '\n';
  if(g[v].size() == 0){
    res[v] = 1;
  }else if(s.size() == g[v].size() && antidep[v] == 1){
    res[v] = 1;
  }else{
    if(antidep[v] > 2){
      res[v] = 0;
    }else{  
      if(co == 1){
        for(int x: g[node]){
          s.insert(col[x]);
        }
        if(s.size() == g[v].size()){
          res[v] = 1;
        }else{
          res[v] = 0;
        }
      }else{
        res[v] = 0;
      }
    }
  }
}
std::vector<int> beechtree(int nn, int mm, std::vector<int> P, std::vector<int> C)
{n=nn, m=mm;
  res.resize(n);
  for(int i = 1; i < n; ++i){
    g[P[i]].pb(i);
    col[i] = C[i];
  }
  // dfs(0);
  // bool ok = 1;
  // res[n - 1] = 1;
  // for(int i = n - 2; i >= 0; --i){
  //   if(ok == 0){
  //     res[i] = ok;
  //   }else if(C[i] != C[i + 1]){
  //     res[i] = 1;
  //     ok = 0;
  //   }else{
  //     res[i] = 1;
  //   }
  // }
  dfs(0);
  return res;
}

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