import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;
import java.util.Vector;

public class cf {
    static final Scanner sc = new Scanner(System.in);
    static final int mod = (int) (1e9 + 7);

    public static void main(String[] args) throws IOException {
        Reader r= new Reader();
        PrintWriter out;
        out = new PrintWriter(System.out);

        // int testcases = sc.nextInt();
        // while (testcases-- > 0) {
        int n = r.nextInt();
        if (n==2) {
            r.nextInt();
            r.nextInt();
            System.out.println(0);
            return;
        }
        Vector<Integer> v[] = new Vector[n + 1];
        int[][] a = new int[n - 1][2];
        Vector<Integer> vector = new Vector<>();
        Set<Integer> set = new HashSet<>();
        for (int i = 0; i < n - 1; i++) {
            a[i][0] = r.nextInt();
            a[i][1] = r.nextInt();

            if (v[a[i][0]] == null) {
                v[a[i][0]] = (Vector<Integer>) vector.clone();
            }
            if (v[a[i][1]] == null) {
                v[a[i][1]] = (Vector<Integer>) vector.clone();
            }
            v[a[i][0]].add(a[i][1]);
            v[a[i][1]].add(a[i][0]);
        }
        for (int i = 1; i < v.length; i++) {
            if (v[i].size() == 1) {
                set.add(i);
            }
        }
        int min = set.size() - 1, max = set.size();
        for (int i = 0; i < a.length; i++) {
            if (set.contains(a[i][0]) || set.contains(a[i][1])) {
                out.println(min);
                min--;
            } else {
                out.println(max);
                max++;
            }
        }
        out.flush();

        // }
    }

    static class Reader 
    { 
        final private int BUFFER_SIZE = 1 << 16; 
        private DataInputStream din; 
        private byte[] buffer; 
        private int bufferPointer, bytesRead; 
  
        public Reader() 
        { 
            din = new DataInputStream(System.in); 
            buffer = new byte[BUFFER_SIZE]; 
            bufferPointer = bytesRead = 0; 
        } 
  
        public Reader(String file_name) throws IOException 
        { 
            din = new DataInputStream(new FileInputStream(file_name)); 
            buffer = new byte[BUFFER_SIZE]; 
            bufferPointer = bytesRead = 0; 
        } 
  
        public String readLine() throws IOException 
        { 
            byte[] buf = new byte[64]; // line length 
            int cnt = 0, c; 
            while ((c = read()) != -1) 
            { 
                if (c == '\n') 
                    break; 
                buf[cnt++] = (byte) c; 
            } 
            return new String(buf, 0, cnt); 
        } 
  
        public int nextInt() throws IOException 
        { 
            int ret = 0; 
            byte c = read(); 
            while (c <= ' ') 
                c = read(); 
            boolean neg = (c == '-'); 
            if (neg) 
                c = read(); 
            do
            { 
                ret = ret * 10 + c - '0'; 
            }  while ((c = read()) >= '0' && c <= '9'); 
  
            if (neg) 
                return -ret; 
            return ret; 
        } 
  
        public long nextLong() throws IOException 
        { 
            long ret = 0; 
            byte c = read(); 
            while (c <= ' ') 
                c = read(); 
            boolean neg = (c == '-'); 
            if (neg) 
                c = read(); 
            do { 
                ret = ret * 10 + c - '0'; 
            } 
            while ((c = read()) >= '0' && c <= '9'); 
            if (neg) 
                return -ret; 
            return ret; 
        } 
  
        public double nextDouble() throws IOException 
        { 
            double ret = 0, div = 1; 
            byte c = read(); 
            while (c <= ' ') 
                c = read(); 
            boolean neg = (c == '-'); 
            if (neg) 
                c = read(); 
  
            do { 
                ret = ret * 10 + c - '0'; 
            } 
            while ((c = read()) >= '0' && c <= '9'); 
  
            if (c == '.') 
            { 
                while ((c = read()) >= '0' && c <= '9') 
                { 
                    ret += (c - '0') / (div *= 10); 
                } 
            } 
  
            if (neg) 
                return -ret; 
            return ret; 
        } 
  
        private void fillBuffer() throws IOException 
        { 
            bytesRead = din.read(buffer, bufferPointer = 0, BUFFER_SIZE); 
            if (bytesRead == -1) 
                buffer[0] = -1; 
        } 
  
        private byte read() throws IOException 
        { 
            if (bufferPointer == bytesRead) 
                fillBuffer(); 
            return buffer[bufferPointer++]; 
        } 
  
        public void close() throws IOException 
        { 
            if (din == null) 
                return; 
            din.close(); 
        } 
    } 
}