Python - ???

#!/usr/bin/env python3

def read_follows():
    file_follows = open("dummy-data-1/follows.txt")

    result = dict()

    for line in file_follows:
        words = line.split()
        result[words[0]] = words[1:]

    file_follows.close()

    return result


def count_follows(data):

    result = dict()

    for user, followers in data.items():
        result[user] = len(followers)

    return result


#--------------------------------------------------------------------

# read file and create dict: data[user] = followers
users_followers = read_follows()

# create dict: data[user] = len(followers)
users_count_followers = count_follows(users_followers)

#--------------------------------------------------------------------

# find max followers (number)
max_follows = max(users_count_followers.values())

#users_max_follows = list()
#
#for name, value in users_count_followers.items():
#    if value == max_follows:
#        users_max_follows.append(name)

# find users with max followers
users_max_follows = [name for name, value in users_count_followers.items() if value == max_follows]

users_max_follows.sort()

print( '\n'.join(users_max_follows) )

#--------------------------------------------------------------------

print('---')
n = int(input('Enter n: '))

# get users which has less then `n` followers
users_filtered = [(value, name) for name, value in users_count_followers.items() if value < n]

names_sorted = sorted(users_filtered, reverse=True)

print('--- count, user ---')
for value, name in names_sorted:
    print(value, name)

print('--- count, followers ---')
for value, name in names_sorted:
    print(value, ' '.join(users_followers[name]))