Submission #780998

#	Time	Username	Problem	Language	Result	Execution time	Memory
780998		Blagoj	Stations (IOI20_stations)	C++17	0 / 100	615 ms	672 KiB

stations

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

using namespace std;

vector<int> g[1005], labels;
int in[1005], out[1005], timer = 0;

void dfs(int n, int p, bool even) {
	if (even) labels[n] = timer++;
	for (auto x : g[n]) if (x != p) dfs(x, n, !even);
	if (!even) labels[n] = timer++;
}
 
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
	labels.resize(n, 0);
	for (int i = 0; i < n; i++) g[i].clear();
	timer = 0;
	for (int i = 0; i < u.size(); i++) {
		g[u[i]].push_back(v[i]);
		g[v[i]].push_back(u[i]);
	}
	dfs(0, -1, 1);
	return labels;
}

int find_next_station(int s, int t, vector<int> c) {
	if (c.back() < s) reverse(c.begin(), c.end());
	for (auto x : c) if (min(x, s) < t && t < max(x, s)) return x;
	return c.back();
}

Compilation message (stderr)

stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:19:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |  for (int i = 0; i < u.size(); i++) {
      |                  ~~^~~~~~~~~~

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