Buggy python submission (verdict: Runtime Error):
N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)


Fixed submission:
import sys
sys.setrecursionlimit(10**9)

N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)

Buggy python submission (verdict: Runtime Error):

N = int(input())

T = [[] for i in range(N)]
F = [None for i in range(N-1)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    T[a-1].append(b-1)
    F[i] = b-1

# print(T)

R = [None for i in range(N)]
def dfs(cur, mx, color):
    R[cur] = color
    if color == -1:
        mx = max(len(T[cur]), mx)
    else:
        mx = max(len(T[cur])+1, mx)
    d = 0
    mmx = mx
    for i,t in enumerate(T[cur], start=1):
        if i==color:
            d=1
        mmx = max(mmx, dfs(t, mx, i+d))
        # dfs(t, mx, i)
    return mmx
for bgn in range(N):
    if len(T[bgn])>0:
        break
# print(bgn)
M = dfs(bgn, 1, -1)
# print(R)
# print(F)
print(M)
for i,f in enumerate(F):
    print(R[f])

Fixed submission:
import sys
sys.setrecursionlimit(10**9)

N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)

Buggy python submission (verdict: Runtime Error):

N = int(input())

T = [[] for i in range(N)]
F = [None for i in range(N-1)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    T[a-1].append(b-1)
    F[i] = b-1

# print(T)

R = [None for i in range(N)]
def dfs(cur, mx, color):
    # R[cur] = color
    if color == -1:
        mx = max(len(T[cur]), mx)
    else:
        mx = max(len(T[cur])+1, mx)
    d = 0
    mmx = mx
    for i,t in enumerate(T[cur], start=1):
        if i==color:
            d=1
        mmx = max(mmx, dfs(t, mx, i+d))
        # dfs(t, mx, i)
    return mmx
M = dfs(0, 1, -1)
# print(R)
# print(F)
# print(M)
# for i,f in enumerate(F):
#     print(R[f])

Fixed submission:
import sys
sys.setrecursionlimit(10**9)

N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)

Buggy python submission (verdict: Runtime Error):

N = int(input())

T = [[] for i in range(N)]
F = [None for i in range(N-1)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    T[a-1].append(b-1)
    F[i] = b-1

# print(T)

R = [None for i in range(N)]
def dfs(cur, mx, color):
    R[cur] = color
    if color == -1:
        mx = max(len(T[cur]), mx)
    else:
        mx = max(len(T[cur])+1, mx)
    d = 0
    mmx = mx
    for i,t in enumerate(T[cur], start=1):
        if i==color:
            d=1
        mmx = max(mmx, dfs(t, mx, i+d))
        # dfs(t, mx, i)
    return mmx
M = dfs(0, 1, -1)
# print(R)
# print(F)
# print(M)
# for i,f in enumerate(F):
#     print(R[f])

Fixed submission:
import sys
sys.setrecursionlimit(10**9)

N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)

Buggy python submission (verdict: Runtime Error):

N = int(input())

T = [[] for i in range(N)]
F = [None for i in range(N-1)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    T[a-1].append(b-1)
    F[i] = b-1

# print(T)

R = [None for i in range(N)]
def dfs(cur, mx, color):
    R[cur] = color
    if color == -1:
        mx = max(len(T[cur]), mx)
    else:
        mx = max(len(T[cur])+1, mx)
    d = 0
    mmx = mx
    for i,t in enumerate(T[cur], start=1):
        if i==color:
            d=1
        mmx = max(mmx,dfs(t, mx, i+d))
        # dfs(t, mx, i)
    return mmx
M = dfs(0, 1, -1)
# print(R)
# print(F)
print(M)
for i,f in enumerate(F):
    print(R[f])

Fixed submission:
import sys
sys.setrecursionlimit(10**9)

N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)

Buggy python submission (verdict: Runtime Error):

N = int(input())

T = [[] for i in range(N)]
F = [None for i in range(N-1)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    T[a-1].append(b-1)
    F[i] = b-1

# print(T)

R = [None for i in range(N)]
def dfs(cur, mx, color):
    R[cur] = color
    if color == -1:
        mx = max(len(T[cur]), mx)
    else:
        mx = max(len(T[cur])+1, mx)
    done = 0
    for i,t in enumerate(T[cur], start=1):
        if i==color:
            done=1
        mx = max(mx,dfs(t, mx, i+done))
        # dfs(t, mx, i)
    return mx
mx = dfs(0, 1, -1)
# print(R)
# print(F)
print(mx)
for i,f in enumerate(F):
    print(R[f])

Fixed submission:
import sys
sys.setrecursionlimit(10**9)

N = int(input())

E = []
T = [[] for i in range(N)]
for i,n in enumerate(range(N-1)):
    a,b = map(int,input().split())
    E.append((a-1,b-1))
    T[a-1].append(b-1)

# print(E)
# print(T)



R = [None for i in range(N)]
def dfs(using, cur):
    R[cur] = using
    i=0
    for t in T[cur]:
        if i==using:
            i+=1
        dfs(i,t)
        i+=1


dfs(-1, 0)

print(max(R)+1)
# print(K)
for e in E:
    print(R[e[1]]+1)

# print(K)