제출 #1025899

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1025899		Gray	참나무 (IOI23_beechtree)	C++17	0 / 100	0 ms	348 KiB

beechtree

#include "beechtree.h"
#include <algorithm>

#define ll long long
#define ff first
#define ss second
#define ln "\n"
#define pll pair<ll, ll>
using namespace std;

vector<vector<ll>> A;
vector<int> col;
vector<int> pos;
ll n, m;
void dfs(ll u){
    bool ispos=1;
    for (auto v:A[u]){
        dfs(v);
        ispos&=pos[v];
        if (col[v]!=col[u] and u!=0) ispos=0;
    }
    pos[u]=ispos;
}

std::vector<int> beechtree(int N, int M, std::vector<int> P, std::vector<int> C)
{
    n=N; m=M;
    A.resize(n);
    pos.resize(n);
    col=C;
    for (ll i=1; i<n; i++){
        A[P[i]].push_back(i);
    }
    // vector<int> ans(n);
    dfs(0);
    return pos;
}

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