topcoder 694题目3 Strange abbreviations are often used to write text messages on uncomfortable mobile devices. One particular strategy for encoding texts composed of alphabetic characters and spaces is the following: Spaces are maintained, and ea

给定n种物品和一背包。物品i的重量是wi，其价值为vi，背包容量为c。问应如何选择装入背包中的物品，使得装入背包中物品的总价值最大。在选择装入背包的物品时，对每种物品i只有两种选择，即装入背包或不装入背包。不能将物品i装入背包多次，也不能只装入部分的物品i。因此，该问题称为0-1背包问题。-Given n types of items and a backpack. Item i is the weight wi, the value of vi, backpack capacity of c.