# # 1) Задание
#
# fib1 = fib2 = 1
#
# n = int(input())
#
# print(fib1, fib2, end=' ')
#
# for i in range(2, n):
#     fib1, fib2 = fib2, fib1 + fib2
#     print(fib2, end=' ')
# =============================================

# 3) Задание
# a = []
# for i in range(2,20):
#     a.append(i)
# number_of_elements = len(a)
# print (number_of_elements, "Недель")
# =============================================