Submission #372999

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
372999	2021-03-03 00:40:49	Kanon	Stations (IOI20_stations)	C++14	100 / 100	1190 ms	1128 KiB

stations

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#include <bits/stdc++.h>
 
using namespace std;
 
vector<int> label(int n, int k, vector<int> u, vector<int> v) {
  vector<vector<int>> g(n);
  for(int i = 0; i < n - 1; i++) {
    int a = u[i], b = v[i];
    g[a].push_back(b);
    g[b].push_back(a);
  }
  vector<int> ret(n, -1);
  vector<int> sub(n);
  vector<int> par(n);
  function<void(int, int)> dfs = [&](int v, int p) {
    par[v] = p;
    sub[v] = 1;
    for(int i : g[v]) {
      if(i == p) continue;
      dfs(i, v);
      sub[v] += sub[i];
    }
  };
  dfs(0, -1);
  function<void(int, int, int, bool)> solve = [&](int v, int L, int R, bool head) {
    ret[v] = head ? L : R;
    int st = L + head;
    for(int i : g[v]) {
      if(i == par[v]) continue;
      solve(i, st, st + sub[i] - 1, !head);
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 8 / 8
• Subtask 3: 16 / 16
• Subtask 4: 10 / 10
• Subtask 5: 61 / 61