#include <bits/stdc++.h>
using namespace std;
const long long N = 2e5 + 5;
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long t;
  t = 1;
  while (t--) {
    long long n;
    cin >> n;
    long long b[N];
    long long a[n - 1][2];
    long long p = 0;
    long long k = n - 2;
    for (long long i = 0; i < n - 1; i++) {
      cin >> a[i][0] >> a[i][1];
      b[a[i][0]]++;
      b[a[i][1]]++;
    }
    for (long long i = 0; i < n - 1; i++) {
      if (b[a[i][0]] == 1 || b[a[i][1]] == 1)
        cout << p++ << endl;
      else
        cout << k-- << endl;
    }
  }
  return 0;
}
