import java.util.*;
import java.lang.*;
import java.io.*;
 
public class c
{
	public static void main (String[] args) throws java.lang.Exception
	{
		MyScanner in = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));
		int T=1;
		for(int test=0;test<T;test++){
			int n = in.nextInt();
			int[] d = new int[n+1];
			int[][] e = new int[n-1][2];
			int ne = 0;
			for(int i=0;i<n-1;i++){
			    int u = in.nextInt();
			    int v = in.nextInt();
			    d[u]++;
			    d[v]++;
			    e[ne][0]=u;
			    e[ne][1]=v;
			    ne++;
			}
			int sn = -1;
			for(int i=1;i<=n;i++){
			    if(d[i]>=3){
			        sn = i;
			    }
			}
			int nlb = 0;
			int[] lb = new int[n-1];
			for(int i=0;i<n-1;i++){
			    if(e[i][0]==sn || e[i][1]==sn){
			        lb[i]=nlb;
			        nlb++;
			    }
			}
			for(int i=0;i<n-1;i++){
			    if(e[i][0]!=sn && e[i][1]!=sn){
			        lb[i]=nlb;
			        nlb++;
			    }
			}
			for(int i=0;i<n-1;i++){
			    out.println(lb[i]);
			}
		}
		out.close();
	}
	public static PrintWriter out;
      
   //-----------MyScanner class for faster input----------
   public static class MyScanner {
      BufferedReader br;
      StringTokenizer st;
 
      public MyScanner() {
         br = new BufferedReader(new InputStreamReader(System.in));
      }
 
      String next() {
          while (st == null || !st.hasMoreElements()) {
              try {
                  st = new StringTokenizer(br.readLine());
              } catch (IOException e) {
                  e.printStackTrace();
              }
          }
          return st.nextToken();
      }
 
      int nextInt() {
          return Integer.parseInt(next());
      }
 
      long nextLong() {
          return Long.parseLong(next());
      }
 
      double nextDouble() {
          return Double.parseDouble(next());
      }
 
      String nextLine(){
          String str = "";
	  try {
	     str = br.readLine();
	  } catch (IOException e) {
	     e.printStackTrace();
	  }
	  return str;
      }
 
   }
}