Almost every problem here have more than one solution and the tutorial usually cover one way to solve the problem so if you are trying to solve a problem and your solution use Dp approach maybe you'll find it difficult when you look at the tutorial and find a math approach.

I have a suggestion, instead of demonstrate one approach, everyone who has a unique approach should give a feedback to the author to add his approach to the tutorial.

I think beginners like me will find it easier this way.