输入总钱数 mmm 和价格 ppp,如果能够购买,则输出在购买该商品后应找的零钱数,精确到两位小数,否则输出 Not Enough Money!
Not Enough Money!
对于不合法的输入(小于 0 的值)则输出 Error。
Error
100 101
0 0
0.00
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