Задание 145

import random

salary = [[random.randint(20000, 100000)] for _ in range(20)]

# print(salary)

number = int(input("Введите номер сотрудника: "))  # 1 - 20

print(salary[number - 1][0] * 12)

Задание 146

import random

data = [[random.randint(0, 1) for _ in range(36)] for _ in range(18)]

# print(data)

number = int(input("Введите номер вагона: "))

print(36 - sum(data[number - 1]))

Задание 147

import random

salary = [[random.randint(20000, 100000) for _ in range(18)] for _ in range(12)]  # 0 - январь

# print(salary)

print(sum(salary[5]))