#include <bits/stdc++.h>
using namespace std;
const long long MOD = (long long)1e9 + 7;
int n, u, v, ans[100009];
vector<int> vec[100009];
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  cin >> n;
  for (int i = 0; i < n - 1; i++) {
    cin >> u >> v;
    vec[u].push_back(i);
    vec[v].push_back(i);
  }
  int cur = 1;
  for (int i = 1; i <= n; i++) {
    if (vec[i].size() > 2) {
      for (int j = 0; j < 3; j++) {
        ans[vec[i][j]] = cur++;
      }
      break;
    }
  }
  for (int i = 0; i < n - 1; i++) {
    if (ans[i] == 0) {
      ans[i] = cur++;
    }
  }
  for (int i = 0; i < n - 1; i++) cout << ans[i] - 1 << " ";
  cout << "\n";
  return 0;
}
