# ------------------- fast io --------------------
import os
import sys
from io import BytesIO, IOBase
 
BUFSIZE = 8192
 
class FastIO(IOBase):
    newlines = 0
    def __init__(self, file):
        self._fd = file.fileno()
        self.buffer = BytesIO()
        self.writable = "x" in file.mode or "r" not in file.mode
        self.write = self.buffer.write if self.writable else None
 
    def read(self):
        while True:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            if not b:
                break
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines = 0
        return self.buffer.read()
 
    def readline(self):
        while self.newlines == 0:
            b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
            self.newlines = b.count(b"\n") + (not b)
            ptr = self.buffer.tell()
            self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
        self.newlines -= 1
        return self.buffer.readline()
 
    def flush(self):
        if self.writable:
            os.write(self._fd, self.buffer.getvalue())
            self.buffer.truncate(0), self.buffer.seek(0)
 
 
class IOWrapper(IOBase):
    def __init__(self, file):
        self.buffer = FastIO(file)
        self.flush = self.buffer.flush
        self.writable = self.buffer.writable
        self.write = lambda s: self.buffer.write(s.encode("ascii"))
        self.read = lambda: self.buffer.read().decode("ascii")
        self.readline = lambda: self.buffer.readline().decode("ascii")
 
 
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
 
# ------------------- fast io --------------------

n=int(input())
graph=[[] for s in range(n)]
inds={}
leaf=set([])
for s in range(n-1):
    u,v=map(int,input().split())
    u-=1
    v-=1
    inds[(u,v)]=s
    inds[(v,u)]=s
    graph[u].append(v)
    graph[v].append(u)
    if len(graph[u])==1:
        leaf.add(u)
    else:
        if u in leaf:
            leaf.remove(u)
    if len(graph[v])==1:
        leaf.add(v)
    else:
        if v in leaf:
            leaf.remove(v)
ans=[-1 for s in range(n-1)]
cv=0
if len(leaf)>=3:
    while len(leaf)>0:
        v0=leaf.pop()
        v1=graph[v0][0]
        ind=inds[(v0,v1)]
        ans[ind]=cv
        cv+=1
    for s in range(n-1):
        if ans[s-1]==-1:
            ans[s-1]=cv
            cv+=1
else:
    #then u can really do much
    for s in range(n-1):
        ans[s]=s
for s in range(n-1):
    print(ans[s])