제출 #1179111

#제출 시각아이디문제언어결과실행 시간메모리
1179111stdfloatSeptember (APIO24_september)C++20
45 / 100
115 ms7872 KiB
#include <bits/stdc++.h>
#include "september.h"
// #include "stub.cpp"
using namespace std;

int solve(int n, int M, vector<int> F, vector<vector<int>> S) {
	assert(M == 1);

	vector<int> E[n];
	for (int i = 1; i < n; i++)
		E[F[i]].push_back(i);

	vector<int> ind(n);
	for (int i = 0; i < n - 1; i++)
		ind[S[0][i]] = i;

	int cnt = 0, r = 0;
	for (int i = 0; i < n - 1; i++) {
		r = max(r, i);
		for (auto j : E[S[0][i]])
			r = max(r, ind[j]);
	
		cnt += (i == r);
	}

	return cnt;
}
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