import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.io.FilterInputStream;
import java.io.BufferedInputStream;
import java.util.ArrayList;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        ScanReader in = new ScanReader(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        CEhabAndPathEticMEXs solver = new CEhabAndPathEticMEXs();
        solver.solve(1, in, out);
        out.close();
    }

    static class CEhabAndPathEticMEXs {
        public void solve(int testNumber, ScanReader in, PrintWriter out) {
            int n = in.scanInt();
            int freq[] = new int[n + 1];
            ArrayList<Integer> edges[] = new ArrayList[n + 1];
            for (int i = 1; i <= n; i++) edges[i] = new ArrayList<>();
            int ans[] = new int[n - 1];


            int max = -1;
            for (int i = 0; i < n - 1; i++) {
                int a = in.scanInt();
                int b = in.scanInt();
                edges[a].add(i);
                edges[b].add(i);
                freq[a]++;
                freq[b]++;
                max = Math.max(max, freq[a]);
                max = Math.max(max, freq[b]);
            }

            int index = -1;
            for (int i = 1; i <= n; i++) if (freq[i] == max) index = i;
            int p = 0;
            Arrays.fill(ans, -1);
            for (int i : edges[index]) ans[i] = p++;
            for (int i = 1; i <= n; i++) {
                for (int k : edges[i]) {
                    if (ans[k] == -1) ans[k] = p++;
                }
            }


            for (int k : ans) {
                out.println(k);
            }

        }

    }

    static class ScanReader {
        private byte[] buf = new byte[4 * 1024];
        private int INDEX;
        private BufferedInputStream in;
        private int TOTAL;

        public ScanReader(InputStream inputStream) {
            in = new BufferedInputStream(inputStream);
        }

        private int scan() {
            if (INDEX >= TOTAL) {
                INDEX = 0;
                try {
                    TOTAL = in.read(buf);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                if (TOTAL <= 0) return -1;
            }
            return buf[INDEX++];
        }

        public int scanInt() {
            int I = 0;
            int n = scan();
            while (isWhiteSpace(n)) n = scan();
            int neg = 1;
            if (n == '-') {
                neg = -1;
                n = scan();
            }
            while (!isWhiteSpace(n)) {
                if (n >= '0' && n <= '9') {
                    I *= 10;
                    I += n - '0';
                    n = scan();
                }
            }
            return neg * I;
        }

        private boolean isWhiteSpace(int n) {
            if (n == ' ' || n == '\n' || n == '\r' || n == '\t' || n == -1) return true;
            else return false;
        }

    }
}

