0-1背包问题， 给定一个载重量为m，n个物品，其重量为wi，价值为vi，1<=i<=n，要求:把物品装入背包，并使包内物品价值最大-0-1 knapsack problem, given a load for the m, n one item, the weight wi, the value of vi, 1 < = i < = n, asked: the items into backpacks, and to bag the maximum value of the goods