百练 / 2016计算机学科夏令营上机考试: E

题目来源：http://noi.openjudge.cn/ch0206/2421/

2421:Exchange Rates

总时间限制: 1000ms      内存限制: 65536kB

描述

Now that the Loonie is hovering about par with theGreenback, you have decided to use your $1000 entrance scholarship to engage incurrency speculation. So you gaze into a crystal ball which predicts theclosing exchange rate between Canadian and U.S. dollars for each of the nextseveral days. On any given day, you can switch all of your money from Canadianto U.S. dollars, or vice versa, at the prevailing exchange rate, less a 3%commission, less any fraction of a cent. 
A