제출 #1152054

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1152054		ElayV13	9월 (APIO24_september)	C++20	0 / 100	1094 ms	1114112 KiB

september

#include "september.h"
#include <bits/stdc++.h>
using namespace std;

const int MAX = 1e5 + 5;
const int inf = 1e9;

int res = 0 , NC;
vector < vector < int > > adj;
vector < int > FC;
vector < vector < int > > SC;
map < int , int > idx;
int cur = inf;

void dfs(int v , int p)
{
      if(idx[v] < cur){
            res++;
            cur = idx[v];
      }
      for(int u : adj[v]){
            if(u == p) continue;
            dfs(u , v);
      }
}

int solve(int N, int M, vector < int > F, vector < vector < int > > S){
      adj.resize(N);
      FC = F;
      SC = S;
      NC = N;
      for(int i = 1;i <= N - 1;i++){
            adj[F[i]].push_back(i);
            adj[i].push_back(F[i]);
      }
      for(int i = 0;i <= N - 2;i++)
      {
            idx[S[0][i]] = i;
      }
      dfs(1 , -1);
      return res;
}

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