Added solution for Project Euler problem 113#3109

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dhruvmanila merged 2 commits intoTheAlgorithms:masterfrom

fpringle:problem_113

Oct 15, 2020

Commits on Oct 9, 2020

Added solution for Project Euler problem 113. Fixes: #2695
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Commits on Oct 15, 2020

Updated formatting and doctests. Reference: #3256
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