Algorithm to find which numbers from a list of size n sum to another number

Interesting answers. Thank you for the pointers to Wikipedia – whilst interesting – they don’t actually solve the problem as stated as I was looking for exact matches – more of an accounting/book balancing problem than a traditional bin-packing / knapsack problem. I have been following the development of stack overflow with interest and wondered … Read more

What are the differences between NP, NP-Complete and NP-Hard?

I assume that you are looking for intuitive definitions, since the technical definitions require quite some time to understand. First of all, let’s remember a preliminary needed concept to understand those definitions. Decision problem: A problem with a yes or no answer. Now, let us define those complexity classes. P P is a complexity class … Read more