Submission #1296924

#	Time	Username	Problem	Language	Result	Execution time	Memory
1296924		kawhiet	Stations (IOI20_stations)	C++20	0 / 100	397 ms	644 KiB

stations

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

vector<int> w, a, out;
vector<vector<int>> g;
int timer = -1;

void dfs(int u, int p) {
	timer++;
	w[u] = 1;	
	a.push_back(u);
	for (auto v : g[u]) {
		if (v != p) {
			dfs(v, u);
			w[u] += w[v];
		}
	}
	timer++;
	out[u] = timer;
}

vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	a.clear();
	g.assign(n, {});
	w.assign(n, 0);
	out.assign(n, 0);
	for (int i = 0; i < n - 1; i++) {
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	dfs(0, -1);
	return out;
}

int find_next_station(int s, int t, vector<int> c) {
	if (s > t) {
		for (auto x : c) {
			if (x > t || x == t) {
				return x;
			}
		}
	}
	return c.back();
}

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