>>> from hw2 import *
>>> print(digit_sum(617))
14
>>> digit_sum(10000000001)
2
>>> digit_sum(digit_sum(999999999))
9
>>> count_digit(2018, 2)
1
>>> count_digit(2018, 4)
1
>>> count_digit(110092008762, 5) + 0
4
>>> round(paei_pi(1),2)
4.0
>>> round(paei_pi(2),5)
2.66667
>>> round(paei_pi(5000),6)
3.141393
>>> stars_horizontal(1)
'*'
>>> print(stars_horizontal(10))
**********
>>> stars_horizontal(20)
'********************'
>>> reverse_args(lambda x, y: x - y) (2, 3)
1
>>> reverse_args(lambda x, y: x / y) (1, 2)
2.0
>>> reverse_args(pow) (2, 10) == 100
True
>>> import sys,io; stdout = sys.stdout; sys.stdout = io.StringIO(); askisi6(); answer = sys.stdout.getvalue().split('\n'); sys.stdout = stdout
>>> 'Per' in answer[0]
True
>>> '6.28' in answer[1]
True
>>> '12.56' in answer[2]
True
>>> 'Em' in answer[11]
True
>>> '1' == answer[12]
True
>>> '36' == answer[17]
True
>>> '=' in answer[20] and '3.14' in answer[20]
True
>>> '28.27' in answer[22][answer[22].index('3')+1:]
True
>>> make_quadratic(0, 0, 2019.0)(2020.0) == 2019.0
True
>>> make_quadratic(-2, 0, 0)(2.0) == -8.0
True
>>> from operator import *; abacize(add)('oooo', 'o')
'ooooo'
>>> abacize(sub)('oooo', 'o')
'ooo'
>>> abacize(pow)('oooo', 'oo')
'oooooooooooooooo'
>>> abacize(floordiv)('oooo', 'oo')
'oo'
>>> abacize(mul)('oooo', 'oo')
'oooooooo'
>>> abacize(mod)('ooooo', 'oo')
'o'
>>> round(sum_squares(1))
1
>>> round(sum_squares(2))
5
>>> round(sum_squares(10))
385
>>> round(sum_squares(120))
583220
>>> print_digits(0)
0
>>> print_digits(218812)
2
1
8
8
1
2
>>> print_digits(12345)
1
2
3
4
5
>>> print_digits(99999)
9
9
9
9
9
>>> print_digits(100000200000050000)
1
0
0
0
0
0
2
0
0
0
0
0
0
5
0
0
0
0