连续邮资问题的完整代码，修改了王晓东《计算机算法设计与分析》（第三版）中代码的错误，为使计算y[k]的过程更清楚，添加了一些中间调试代码。-Continuous postage question the integrity of the code, modify the Xiaodong " Computer Algorithm Design and Analysis" (third edition), the error code, for the calculation o