Submission #833732

#	Time	Username	Problem	Language	Result	Execution time	Memory
833732		Sohsoh84	Stations (IOI20_stations)	C++17	0 / 100	3041 ms	2097152 KiB

stations

#include "stations.h"
#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e5 + 10;

int t;
vector<int> labels, adj[MAXN];

void dfs(int v, int p, bool b) {
	if (!b) labels[v] = t++;

	for (int u : adj[v])
		if (u != p)
			dfs(u, v, !b);
	
	if (b) labels[v] = t++;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	labels.resize(n);
	for (int i = 0; i < n - 1; i++) {
		adj[u[i]].push_back(v[i]);
		adj[v[i]].push_back(u[i]);
	}

	dfs(0, 0, false);
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	sort(c.begin(), c.end());
	bool f = s < c[0];
	int n = c.size();

	if (f) {
		if (s == 0) {
			n++;
			c.push_back(MAXN);
		}

		if (t < s || (n == 1 || t > c[n - 2])) return c[n - 1];
		return *lower_bound(c.begin(), c.end(), t);
	} else {
		if (t > s || (n == 1 || t < c[1])) return c[0];
		return *prev(upper_bound(c.begin(), c.end(), t));
	}
}

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