Submission #993474

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
993474	2024-06-05 18:00:15	doducanh	Hard route (IZhO17_road)	C++14	100 / 100	578 ms	179028 KiB

road

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#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
  int n;
  cin >> n;
  vector<vector<int>> adj(n);
  for (int i = 1; i < n; i++) {
    int x, y;
    cin >> x >> y;
    adj[--x].push_back(--y);
    adj[y].push_back(x);
  }
  vector<int> max_length(n);
  vector<int> path_count(n);
  /**
   * Calculates the longest path from vertex u,
   * and the number of such paths.
   */
  function<void(int, int)> dfs = [&](int u, int p) {
    max_length[u] = 0;
    path_count[u] = 1;
    for (int v : adj[u])
      if (v != p) {
        dfs(v, u);
        if (max_length[u] < max_length[v] + 1) {
          max_length[u] = max_length[v] + 1;
          path_count[u] = path_count[v];
 
 
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Compilation message (stderr)

road.cpp: In lambda function:
road.cpp:67:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   67 |    for (auto [len, amt] : paths) {
      |              ^
road.cpp:77:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   77 |     for (auto [len, amt] : paths) {
      |               ^
road.cpp:87:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   87 |     for (auto [len, amt] : paths) {
      |               ^
road.cpp:106:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  106 |   for (auto [len, amt] : paths) {
      |             ^

• Subtask 1: 19 / 19
• Subtask 2: 33 / 33
• Subtask 3: 48 / 48