摘要：
Bin Dec Hex 缩写/字符 解释 0000 0000 0 00 NUL(null) 空字符 0000 0001 1 01 SOH(start of headline) 标题开始 0000 0010 2 02 STX (start of text) 正文开始 0000 0011 3 03 ET 阅读全文
摘要：
Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive intege 阅读全文
摘要：
You are playing the following Bulls and Cows game with your friend: You write down a number and ask your friend to guess what the number is. Each time 阅读全文