用动态规划的向后处理法求解背包问题的最优决策序列。即给定一个背包序列的重量和相对应的效益值。做出一个最优决策序列Xi(i=1~n)，使得最终效益和最大。-dynamic planning backward processing method knapsack problem of optimal decision-making sequence. That is, given a sequence of backpack weight and the relative value of the benefits should be. To make an optimal decision-making sequence Xi (i = 1 ~ n), and makes the ultimate effectiveness of the largest.