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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. long long height[500000 + 5];
  5.  
  6. void DFS(long long node, vector<long long> G[], long long used[], long long parent[]) {
  7.     used[node] = 1;
  8.  
  9.     for (long long neighbour : G[node]) {
  10.         if (used[neighbour] == 0) {
  11.             parent[neighbour] = node;
  12.             DFS(neighbour, G, used, parent);
  13.         }
  14.     }
  15.  
  16.     long long h = 0;
  17.  
  18.     for (long long child : G[node]) {
  19.         if (child != parent[node]) {
  20.             h = max(h, height[child]);
  21.         }
  22.     }
  23.  
  24.     height[node] = h + 1;
  25. }
  26.  
  27. int main() {
  28.     long long n;
  29.     cin >> n;
  30.  
  31.     vector<long long> G[n + 1];
  32.  
  33.     for (long long i = 1; i <= n - 1; i++) {
  34.         long long u, v;
  35.         cin >> u >> v;
  36.  
  37.         G[u].push_back(v);
  38.         G[v].push_back(u);
  39.     }
  40.  
  41.     long long used[n + 1] = {};
  42.     long long parent[n + 1] = {};
  43.  
  44.     DFS(1, G, used, parent);
  45.  
  46.     for (long long i = 1; i <= n; i++) {
  47.         cout << height[i] << '\n';
  48.     }
  49.  
  50.     return 0;
  51. }
Success #stdin #stdout 0s 5320KB
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https://ideone.com/BM7ACb
language:
C++14 (gcc 8.3)
created:
1 day ago
visibility:
public

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