what exclusive or

Description: Given an array of N integers, such that each number in the array appears exactly twice, counter t for three numbers (say a, B and c) which appear exactly once. In O (n) time and O (1) space find A, B and C.     Analysis: Let's take a

I was planning to write this article when I came back from work. On the one hand, it is a note record for today's learning, and on the other hand, it is a basic knowledge of SWF file encryption for some friends. The reason is that it is the

Question: Given a string of numbers, pre [I] (the variance of the previous I number or) is a [0] ~ A [I-1] exclusive or, post [I] (suffix exclusive or) is a [I] ~ Returns the exclusive or of a [n-1] and returns the maximum value of pre [I] ^ post [J]

There are many introductions on the DES algorithm on the Internet, with the same general idea. However, the handling of many details is not clear, and the source code quality is also uneven. For this reason, I have spent a lot of time studying it.

Of course, O (1) space complexity is required... Let's take a look at a simple version: Returns the number of occurrences of a sequence. The number of odd numbers in coj 1217 Http: // 122.207.68.93/onlinejudge/problem. php? Id = 1217 We know that

1001: Inversion Template question: Find Reverse Order Number pairs. You can cut the number of Reverse Order pairs. 1003: least common multiple For each subset, LCM is the maximum power of A of 2 x the maximum power of B of 3. So we only need to find

Given a sequence, the largest suborder in [L, R] is different or forced online. Attention of students who have been Re, if this question is forced to be online, if it is directly added, int will pop up, resulting in negative subscript of the called

There is a simple problem: given n-m + 2 (or N-m) composed of Positive IntegersDisordered SequenceThe elements are positive integers from m to n (n> m> = 1), and only one is repeated (or missing. How to find the number? (Assume that the missing

  There is a very interesting game, that is, there are several heaps of objects, either matchsticks or pawn pieces. TwoPeople take several objects from the heap in turn, and the final winner of the light object is required. This is an ancient game

I always think that the pressure is a violent search. In fact, this is also a violent search... Http://acm.hdu.edu.cn/showproblem.php? PID = 1, 4317 Question: give you n numbers. You can add a value to each number to make the difference or value of

It is often used to exchange values of two variables when learning programming languages and designing programs. Generally, we define a new variable and use it for exchange. The Code is as follows: int a,b,t; a=10; b=15; t=a; a=b; b=t; This

Abstract: CRC (cyclic redundancy check) is widely used in error detection during data communication.Error Checking capability. This article describes in detail the basic principles of CRC and explains the concept of the common lookup

[Sword refers to Offer learning] [interview question 47: addition without subtraction, multiplication, division], sword refers to offer Question: To write a function and calculate the sum of two integers, The +,-, ×, and limit operators must not be

The following is the PPT content of the author's video course, which explains the coding calculation, detection error and Error Correction principles of Haiming code in detail and in plain terms. If the PPT is concise and hard to understand, the

Do what you like! ------ You will plug-in on your own tomorrow. As online games become increasingly popular, many players will join the game. Currently, many players rely on some game plug-ins. Program To play the game. So is it very difficult to

Document directory What does it mean for a message to be "fully processed "? What happens if a message is fully processed or fails to be fully processed? What is Storm's reliability API? How do I make my applications work correctly given that

From: http://zhedahht.blog.163.com/blog/static/254111742011125100605/ Question: To write a function and calculate the sum of the two integers, you must not use +,-, ×, and limit in the function body. Analysis: the binary value of 5 is 10001. We

Document directory Z-Order Curve Http://en.wikipedia.org/wiki/Z-order_curveZ-Order Curve From Wikipedia, the free encyclopedia Jump to: navigation, search Not to be confused with Z curve or Z-order. Four iterations of the Z-order curve. Z-

Original Author: Rosen Jiang Source:Http://www.blogjava.net/rosen Shift Operator Including:"> Right shift"; ">> unsigned right shift" Example:-5> 3 =-11111 1111 1111 1111 1111 1111 11111111 1111 1111 1111 1111 1111 1111The result is exactly the same

1. arithmetic operation points (1) shift operation ① Original code shift: the original code does not change the form of the original code when performing arithmetic shift left or arithmetic shift right. Shifts one digit to the left is equal to