제출 #1064522

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1064522		Shadow1	9월 (APIO24_september)	C++17	0 / 100	8 ms	604 KiB

september

#include "september.h"

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

#define output_vector(v) for(auto &x : v){cout << x << ' ';}cout << '\n';
#define show(x) cerr << (#x) << " = " << (x) << '\n';



int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) {
	int ans = N;
	vector<vector<int>> child(N);
	for(int i=1; i<N; ++i) {
		child[F[i]].push_back(i);
	}
	for(int i=0; i<M; ++i) {
		int cnt = 0;
		set<int> cur;
		vector<set<int>> c(N);
		for(int j=0; j<N; ++j) {
			for(auto &k : child[j])
				c[j].insert(k);
		}
		for(int j=0; j<N; ++j) {
			int k = S[i][j];
			cur.insert(k);
			while(k > 0 && c[k].empty()) {
				cur.erase(k);
				c[F[k]].erase(k);
				k = F[k];
			}
			cnt += (cur.empty());
		}
		ans = min(ans, cnt);
	}
	return ans;
}

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