摘要：
There are NNN children in kindergarten. Miss Li bought them NNN candies. To make the process more interesting, Miss Li comes up with the rule: All the 阅读全文
摘要：
Bob is a sorcerer. He lives in a cuboid room which has a length of AAA, a width of BBB and a height of CCC, so we represent it as AAA * BBB * CCC. One 阅读全文