Submission #310049

#	Time	Username	Problem	Language	Result	Execution time	Memory
310049		Lemur95	Stations (IOI20_stations)	C++17	0 / 100	2186 ms	2097156 KiB

stations

#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#define x first
#define y second
#define ld long double
#define ll long long

using namespace std;

vector <int> g[1005];
int nr;

void dfs(int nod, int h, int tata, vector <int> &labels) {
  if(h % 2 == 0)
    labels[nod] = nr++;
  for(auto &fiu : g[nod]) {
    if(fiu != tata)
      dfs(fiu, h + 1, nod, labels);
  }
  if(h % 2)
    labels[nod] = nr++;
}

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

int find_next_station(int s, int t, vector <int> c) {
  if(s < c[0]) {
    int tmp = s;
    for(auto &i : c) {
      if(tmp < t && t <= i)
        return i;
      tmp = i;
    }
    return c.back();
  }
  for(int i = 0; i < c.size(); i++) {
    if(c[i] <= t && t < (i != c.size() - 1 ? c[i + 1] : s + 1))
      return c[i];
  }
  return c[0];
}

Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:45:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   for(int i = 0; i < c.size(); i++) {
      |                  ~~^~~~~~~~~~
stations.cpp:46:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |     if(c[i] <= t && t < (i != c.size() - 1 ? c[i + 1] : s + 1))
      |                          ~~^~~~~~~~~~~~~~~

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