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* Rename all Project Euler directories: Reason: The change was done to maintain consistency throughout the directory and to keep all directories in sorted order. Due to the above change, some config files had to be modified: 'problem_22` -> `problem_022` * Update scripts to pad zeroes in PE directories
31 lines
569 B
Python
31 lines
569 B
Python
"""
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Problem 16: https://projecteuler.net/problem=16
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2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.
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What is the sum of the digits of the number 2^1000?
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"""
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def solution(power: int = 1000) -> int:
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"""Returns the sum of the digits of the number 2^power.
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>>> solution(1000)
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1366
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>>> solution(50)
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76
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>>> solution(20)
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31
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>>> solution(15)
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26
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"""
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n = 2 ** power
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r = 0
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while n:
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r, n = r + n % 10, n // 10
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return r
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if __name__ == "__main__":
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print(solution(int(str(input()).strip())))
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