제출 #413221

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
413221		SuhaibSawalha1	Stations (IOI20_stations)	C++17	0 / 100	1130 ms	708 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
 
vector<vector<int>> adj;
vector<int> lab;
int cnt;
 
void dfs (int u, int p = -1) {
	for (int v : adj[u]) {
		if (v ^ p) {
			dfs(v, u);
		}
	}
	lab[u] = cnt++;
}
 
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	adj.assign(n, {});
	lab.resize(n);
	cnt = 0;
	for (int i = 0; i < n - 1; ++i) {
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}
	if (all_of(adj.begin(), adj.end(), [](auto &e) {return e.size() < 3;})) {
		for (int i = 0; i < n; ++i) {
			if (adj[i].size() == 1) {
				dfs(i);
				break;
			}
		}
		return lab;
	}
	iota(lab.begin(), lab.end(), 0);
	return lab;
}
 
int find_next_station(int s, int t, vector<int> c) {
	if (c[0] != (s - 1) / 2) {
		return s - (t < s) + (t > s);
	}
	int e = t;
	while (e) {
		int p = (e - 1) / 2;
		if (p == s) {
			return e;
		}
		e = p;
	}
	return (s - 1) / 2;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 0 / 16
• Subtask 4: 0 / 10
• Subtask 5: 0 / 61