Python/project_euler/problem_16/sol2.py
fa1l 10fe9d9be4
Coding style improvements for project_euler problem 45 & 16 (#3087)
* improvements for project euler task 45

* fixed documentation

* update pe_16/sol1.py

* update pe_16/sol2.py

* revert solution changes for sol1

* revert solution changes for sol2

* remove trailing spaces in sol1

* Update sol1.py

Co-authored-by: Dhruv <dhruvmanila@gmail.com>
2020-10-09 12:09:44 +05:30

31 lines
569 B
Python

"""
Problem 16: https://projecteuler.net/problem=16
2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.
What is the sum of the digits of the number 2^1000?
"""
def solution(power: int = 1000) -> int:
"""Returns the sum of the digits of the number 2^power.
>>> solution(1000)
1366
>>> solution(50)
76
>>> solution(20)
31
>>> solution(15)
26
"""
n = 2 ** power
r = 0
while n:
r, n = r + n % 10, n // 10
return r
if __name__ == "__main__":
print(solution(int(str(input()).strip())))