Ad hoc

Ad Hoc category contains problems which don't need a particular algorithm. This means that you will have to create the algorithm to solve the problem without thinking about Graph Theory, DP, Backtracking or any other algorithms category.

Ad Hoc problems are in general considered easy to solve, in fact, it's the best category for those who are starting, but pay attention, there are also difficult Ad Hoc problems that will need some experience to get solved.