# Overview

Usually I try to solve the original challenge from Project Euler first and then tackle its modified version at Hackerrank which is often harder.

# Heatmap

green problems solve the original Project Euler problem and have a perfect score of 100% at Hackerrank, too.

yellow problems score less than 100% at Hackerrank (but still solve the original problem).

gray problems are already solved but I haven't published my solution yet.

blue problems are already solved and there wasn't a Hackerrank version of it (at the time I solved it) or I didn't care about it because it differed too much.

*Please click on a problem's number to open my solution to that problem:*

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# Most recently solved

May 24, 2017: Problem 134 - Prime pair connectionMay 23, 2017: Problem 187 - Semiprimes

May 23, 2017: Problem 174 - Counting the number of "hollow" square laminae that can form one, two, three, ... distinct arrangements

May 23, 2017: Problem 151 - Paper sheets of standard sizes: an expected-value problem

May 23, 2017: Problem 101 - Optimum polynomial

May 22, 2017: Problem 173 - Using up to one million tiles how many different "hollow" square laminae can be formed?

May 21, 2017: Problem 129 - Repunit divisibility

May 19, 2017: Problem 136 - Singleton differences

May 19, 2017: Problem 135 - Same differences

May 19, 2017: Problem 124 - Ordered radicals

... and 120 more ...