Submission #623333

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
623333	2022-08-05 13:00:35	M_W	Stations (IOI20_stations)	C++17	100 / 100	903 ms	836 KiB

stations

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#include <bits/stdc++.h>
#include "stations.h"
using namespace std;
int _labels[1010];
vector<int> adj[1010];
int N, K, timer = 0;
void dfs(int a, int p, int lv){
  if(!lv) _labels[a] = timer++;
  for(auto x : adj[a]){
    if(x == p) continue;
    dfs(x, a, 1 - lv);
  }
  if(lv) _labels[a] = timer++;
}
vector<int> label(int _N, int _K, vector<int> U, vector<int> V) {
  N = _N; K = _K; timer = 0;
  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, 0);
  vector<int> res; 
  for(int i = 0; i < N; i++) res.push_back(_labels[i]);
  for(int i = 0; i < N; i++) adj[i].clear();
  return res;
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:35:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |   for(int i = 0; i < C.size() - 1; i++){
      |                  ~~^~~~~~~~~~~~~~
stations.cpp:42:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |   for(int i = 1; i < C.size() - 1; i++){
      |                  ~~^~~~~~~~~~~~~~

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