Here i add the solutions i write for the problem solving questions that i find.
I am subscribed to two websites that are sending me emails every day with new questions to solve.
These questions are interview questions asked by the big companies like (Google, Facebook, Apple, Microsoft, Amazon, Twitter, Uber, Airbnb ..)
I try to make my solutions as clear as possible and of course as optimal as possible in execution time and memory consumption
I have been using PHP for i am familiar with this language the most.
Hackerrank (There's no subscription section, sign up and solve some questions and you will receive emails)