Knapsack 0-1 path reconstruction (which items to take) [duplicate]

This question already has answers here: 开发者_开发技巧 How to find which elements are in the bag, using Knapsack Algorithm [and not only the bag's value]?

Grammar: difference between a top down and bottom up? (Example)

This is a follow up question from Grammar: difference between a top down and bottom up? I understand from that question that:

地下城与勇士 一个4级的小号找个师傅带塔，一次得多少经验？？大概？