[Update] This can be seen as one variation of the knapsack problem. http://en.wikipedia.org/wiki/List_of_knapsack_problems http://en.wikipedia.org/wiki/List_of

[Update] This can be seen as one variation of the knapsack problem. http://en.wikipedia.org/wiki/List_of_knapsack_problems http://en.wikipedia.org/wiki/List_of_knapsack_problems