Given an array of integers, every element appears twice except for one. Find that single one. Note:Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? 题目分析:数字每一位存在数组中,每个数字承兑出现,只有一个数字只出现一次,我们知道异或运…
I - Matches Game Description Here is a simple game. In this game, there are several piles of matches and two players. The two player play in turn. In each turn, one can choose a pile and take away arbitrary number of matches from the pile (Of course…
位运算符主要针对二进制,它包括了:“与”.“非”.“或”.“异或”.从表面上看似乎有点像逻辑运算符,但逻辑运算符是针对两个关系运算符来进行逻辑运算,而位运算符主要针对两个二进制数的位进行逻辑运算.下面详细介绍每个位运算符. 1.与运算符与运算符用符号“&”表示,其使用规律如下:两个操作数中位都为1,结果才为1,否则结果为0,例如下面的程序段. public class data1 { public static void main(String[] args) { int a=129; int…