Submission #614485

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
614485	2022-07-31 03:24:43	penguinhacker	Stations (IOI20_stations)	C++17	0 / 100	6 ms	916 KiB

stations

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
const int mxN=1000;
int n, tin[mxN], tout[mxN], t, d[mxN];
vector<int> adj[mxN];
void dfs(int u=0, int p=-1) {
  tin[u]=t++;
  for (int v : adj[u])
    if (v!=p) {
      d[v]=d[u]+1;
      dfs(v, u);
    }
  tout[u]=t++;
}
vector<int> label(int _n, int _k, vector<int> u, vector<int> v) {
  n=_n;
  for (int i=0; i<n; ++i)
    adj[i].clear();
  for (int i=0; i<n-1; i++) {
    adj[u[i]].push_back(v[i]);
    adj[v[i]].push_back(u[i]);
  }
  dfs();
  vector<int> inds(n), labels(n);
  iota(inds.begin(), inds.end(), 0);
  sort(inds.begin(), inds.end(), [](int a, int b) { return (d[a]%2?tout[a]:tin[a])<(d[b]%2?tout[b]:tin[b]); });
 
 
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Compilation message (stderr)

stations.cpp: In function 'int find_next_station(int, int, std::vector<int>)':
stations.cpp:41:15: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   41 |   if (!s||s<=t&&t<=c.end()[-2]) { // t is in subtree of s
stations.cpp:42:25: 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=0; i+(s>0)<c.size(); ++i)
      |                  ~~~~~~~^~~~~~~~~

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