Submission #781003

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
781003	2023-07-12 15:32:21	Blagoj	Stations (IOI20_stations)	C++17	100 / 100	842 ms	916 KiB

stations

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#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();
 
 
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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: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61