제출 #1160392

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1160392		mentalmath231	September (APIO24_september)	C++20	0 / 100	2 ms	3140 KiB

september

#include <bits/stdc++.h>
using namespace std; 
typedef long long ll;
int cnt = 0;
vector<int> visited(100002,0);
vector<vector<int>> kid(100002,vector<int>());
void dfs(int x){
	if (!visited[x]){
		cnt +=1;
		visited[x] = 1;
		for (auto i: kid[x]){
			dfs(i);
		}
	}
}
int solve(int n, int m, vector<int> f,  vector<vector<int>> s) {
	int ans = 0;
	for (int i =1; i<n; i++){
		kid[f[i]].push_back(i);
	}
	for (int i =0; i<n-1; i++){
		dfs(s[0][i]);
		if (cnt == i+1){
			ans +=1;
		}
	}
	return ans;
}

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