Submission #342051

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
342051	2021-01-01 08:12:02	SeDunion	Stations (IOI20_stations)	C++17	100 / 100	1111 ms	1380 KiB

stations

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> g[2002];
int tin[2002], tout[2002], timer;
void dfs(int v, vector<int> &labels, int p = -1, int d = 0) {
  if (!d) labels[v] = timer++;
  for (int to : g[v]) if (to != p) {
    dfs(to, labels, v, d ^ 1);
  }
  if (d) labels[v] = timer++;
}
std::vector<int> label(int n, int k, std::vector<int> u, std::vector<int> v) {
  std::vector<int> labels(n);
  for (int i = 0; i < n; i++) {
    g[i].clear();
  }
  timer = 0;
  for (int i = 0 ; i < n - 1 ; ++ i) {
    g[u[i]].push_back(v[i]);
    g[v[i]].push_back(u[i]);
  }
  dfs(1, labels);
  return labels;
}
 
 
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Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:40:19: warning: control reaches end of non-void function [-Wreturn-type]
   40 |  vector<int> din(m), dout(m);
      |                   ^

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