From time to time I am asked to solve some things by using my proffesional knowledge. Sometimes the solutions are dummy and boring, but sometimes are not. Othertimes the problem is easy to be named, but the solution is very hard to be found. And often, the same solution can be applied in many situations for different people. For this reason, I'll publish some solutions I feel they are of larger interest. That way, we all can spare some extra-time.
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