Submission #1162477

#	Time	Username	Problem	Language	Result	Execution time	Memory
1162477		nnin	September (APIO24_september)	C++17	100 / 100	147 ms	16348 KiB

september

#include "september.h"
#include<bits/stdc++.h>
using namespace std;
#define pii pair<int,int>

int posi[100005];
vector<int> adj[100005];

void dfs(int u) {
	for(int v:adj[u]) {
		dfs(v);
		posi[u] = max(posi[u], posi[v]);
	}
}

int solve(int N, int M, std::vector<int> F, std::vector<std::vector<int>> S) {
	adj[0].clear();
	for(int i=1;i<N;i++) {
		posi[i] = 1e9;
		adj[i].clear();
	}
	for(int i=0;i<M;i++) for(int j=0;j<N-1;j++) {
		posi[S[i][j]] = min(posi[S[i][j]], j);
	}
	vector<pii> ord;
	for(int i=1;i<N;i++) {
		ord.push_back({posi[i], i});
		adj[F[i]].push_back(i);
	}
	sort(ord.begin(), ord.end());
	for(int i=0;i<M;i++) for(int j=0;j<N-1;j++) {
		posi[S[i][j]] = max(posi[S[i][j]], j);
	}
	dfs(0);
	int day = 0, cur = -1;
	for(auto [p, u]:ord) {
		if(p>cur) day++;
		cur = max(cur, posi[u]);
	}
	return day;
}

• Subtask 1: 11 / 11
• Subtask 2: 14 / 14
• Subtask 3: 5 / 5
• Subtask 4: 9 / 9
• Subtask 5: 5 / 5
• Subtask 6: 11 / 11
• Subtask 7: 9 / 9
• Subtask 8: 11 / 11
• Subtask 9: 9 / 9
• Subtask 10: 16 / 16