Submission #304908

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
304908	2020-09-22 07:40:46	model_code	Stations (IOI20_stations)	C++17	100 / 100	1236 ms	1520 KiB

stations

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#include "stations.h"
#include <bits/stdc++.h>
using namespace std;
vector<int> sz, labels;
vector<vector<int>> E;
int dfsSiz(int x, int p = -1) {
  sz[x] = 1;
  for (int y : E[x]) {
    if (y == p) continue;
    sz[x] += dfsSiz(y, x);
  }
  return sz[x];
}
void dfs(int x, int s, int e, int p = -1, int h = 0) {
  if (h & 1) {
    labels[x] = e--;
  } else {
    labels[x] = s++;
  }
  for (int y : E[x]) {
    if (y == p) continue;
    dfs(y, s, s + sz[y] - 1, x, h + 1);
    s += sz[y];
  }
  assert(s == e + 1);
}
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  assert(u.size() == n - 1 && v.size() == n - 1);
  sz = vector<int>(n);
  labels = vector<int>(n);
 
 
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Compilation message (stderr)

In file included from /usr/include/c++/9/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/9/bits/stdc++.h:33,
                 from stations.cpp:2:
stations.cpp: In function 'std::vector<int> label(int, int, std::vector<int>, std::vector<int>)':
stations.cpp:28:18: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |  assert(u.size() == n - 1 && v.size() == n - 1);
      |         ~~~~~~~~~^~~~~~~~
stations.cpp:28:39: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |  assert(u.size() == n - 1 && v.size() == n - 1);
      |                              ~~~~~~~~~^~~~~~~~

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