#include <bits/stdc++.h> using namespace std; #define ll long long #define value first #define index second #define EGRY \ ios_base::sync_with_stdio(false); \ cin.tie(NULL); const int MAX = 2 * 1e5 + 1000; const int MOD = 1e9 + 7; const int OO = INT_MAX; const double EPS = (double)1e-9; vector<int> graph[MAX]; int mx = -1, mx_node = -1; vector<int> diameter(2); vector<vector<int>> from_leafs; void dfs(int root, int par = -1, int depth = 0) { if (depth > mx) { mx = depth; mx_node = root; } for (auto &child : graph[root]) { if (child != par) { dfs(child, root, depth + 1); } } } void bfs(int root, bool leaf) { queue<int> q; q.push(root); from_leafs[leaf][root] = 0; int level = 0, size = (ll)q.size(); unordered_map<int, int> vis; vis[root] = true; while (!q.empty()) { while (size--) { int cur = q.front(); q.pop(); from_leafs[leaf][cur] = level; for (auto &child : graph[cur]) { if (!vis.count(child)) { vis[child] = true; q.push(child); } } } size = (ll)q.size(), level++; } } void solve() { int n; cin >> n; for (int i = 0; i < n - 1; i++) { int x, y; cin >> x >> y; graph[x].push_back(y); graph[y].push_back(x); } dfs(1, -1, 0); diameter[0] = mx_node; mx = -1; dfs(mx_node, -1, 0); diameter[1] = mx_node; from_leafs = vector<vector<int>>(2, vector<int>(n + 1)); bfs(diameter[0], 0); bfs(diameter[1], 1); for (int i = 1; i <= n; i++) { cout << max(from_leafs[0][i], from_leafs[1][i]) << " "; } } int main() { EGRY ll t = 1; // cin >> t; while (t--) { solve(); } return 0; }
Standard input is empty
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