#include <bits/stdc++.h>
using namespace std;
list<int> adjList[100005];
int mxdeg = -1;
int mv = -1;
int ans[100005];
int sz[100005];
int main() {
  int(n);
  scanf("%d", &(n));
  vector<pair<int, int> > v;
  for (int i = 0; i < n - 1; i++) {
    int(a), (b);
    scanf("%d %d", &(a), &(b));
    adjList[a].push_back(b);
    adjList[b].push_back(a);
    v.push_back({a, b});
    sz[a]++;
    sz[b]++;
    if (sz[a] > mxdeg) {
      mxdeg = sz[a];
      mv = a;
    }
    if (sz[b] > mxdeg) {
      mxdeg = sz[b];
      mv = b;
    }
  }
  int ctr = 1;
  for (int i = 0; i < n - 1; i++) {
    if (v[i].first == mv || v[i].second == mv) ans[i] = ctr, ctr++;
  }
  for (int i = 0; i < n - 1; i++) {
    if (!ans[i]) ans[i] = ctr, ctr++;
  }
  for (int i = 0; i < n - 1; i++) {
    cout << ans[i] - 1 << "\n";
  }
  return 0;
}
