摘要：Given a non-negative integernum, repeatedly add all its digits until the result has only one digit.For example:Givennum = 38, the process is like:3 + ... 阅读全文
292_Nim Game
2015-11-26 13:56 by FTD_W, 135 阅读, 0 推荐, 收藏, 编辑
摘要：You are playing the following Nim Game with your friend: There is a heap of stones on the table, each time one of you take turns to remove 1 to 3 ston... 阅读全文
关于抑或
2015-11-26 13:19 by FTD_W, 176 阅读, 0 推荐, 收藏, 编辑
摘要：1. 使用抑或可以交换两个整数的值，不用借助第三个数字 a = a ^ b; b = b ^ a; a = a ^ b; 2.抑或可交换 a ^ b = b ^ a; 3.两个相同的整数，抑或运算后为0 ------------ 这一点可以经常利用 阅读全文