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Room_Allocation.py

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####################################################################################

# Please consider trying a few more times before referring to this code.

# Code might be incorrect - TLE / Wrong Answer (especially filenames with _1 , _2)

# Pedagogical > Pythonic

####################################################################################

# sadly taking too much time :(

n = int(input())

I = lambda : map(int, input().split())

arr, dep = [], []

for _ in range(n):

a, d = I()

arr.append(a)

dep.append(d)

ind_a = sorted(range(n), key = lambda i: arr[i])

ind_d = sorted(range(n), key = lambda i: dep[i])

# print(len(arr), len(dep))

cnt, maxcnt = 0, 0

room_assigned = [0] * n

i = 0

to_fill = list(range(n, 0, -1))

for idx, a in enumerate(ind_a):

while dep[ind_d[i]] < arr[a]:

cnt -= 1

to_fill.append(room_assigned[ind_d[i]])

# print(to_fill)

i += 1

cnt += 1

room_assigned[a] = to_fill.pop()

if cnt > maxcnt: maxcnt = cnt

print(maxcnt)

print(" ".join([str(i) for i in room_assigned]))

# I once again ask you to try a few more times before referring here