Dynamic Programming
Both a mathematical optimization method and a computer programming method that breaks down complicated problems to sub-problems.
Interview Problems
Why do I see duplicate challenges? You'll see duplicates because a question may fall into different categories. We keep them here bec ause we believe that it is good to sporadically review old challenges. They are optional if already completed-- but reviewing them (and more importantly redoing them with the new knowledge) will ensure that you've let the material sink in.