摘要：
A common pastime for poker players at a poker table is to shuffle stacks of chips. Shuffling chips is performed by starting with two stacks of poker c 阅读全文
摘要：
The ministers of the cabinet were quite upset by the message from the Chief of Security stating that they would all have to change the four-digit room 阅读全文
摘要：
Given a positive integer n, write a program to find out a nonzero multiple m of n whose decimal representation contains only the digits 0 and 1. You m 阅读全文