func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long INF = 1e9;   const long long MOD = 1e9 + 7;   const long long maxn = 1e5 + 7;   const long long maxm = 2e5 + 7;   struct Edge {     int end, idx, label, vis;   };   vector<Edge> adj[maxn];   vector<int> deg[maxn];   int n, ans[maxn], vis[maxn];   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     ;     cin >> n;     for (int i = 0; i <= n - 2; i++) {       int u, v;       cin >> u >> v;       Edge e;       e.idx = i;       e.end = u;       adj[v].push_back(e);       e.end = v;       adj[u].push_back(e);     }     for (int i = 1; i <= n; i++) {       deg[adj[i].size()].push_back(i);     }     int maxUsed = 0;     for (int d = 1; d <= n - 1; d++) {       for (int u : deg[d]) {         for (Edge e : adj[u]) {           if (!vis[e.end]) {             ans[e.idx] = maxUsed;             maxUsed++;           }         }         vis[u] = true;       }     }     for (int i = 0; i <= n - 2; i++) {       cout << ans[i] << endl;     }     return 0;   }   