how to find average of 2 numbers

Question: except two numbers in an integer array, the other numbers appear twice. Write a program to find the numbers that appear only once. The time complexity is O (n) and the space complexity is O (1 ). Idea: The question requires that the time complexity be O (N) and the space complexity be O (1). This means that t

Quickly find a description of the two-number problem that satisfies the conditionCan you quickly figure out the two numbers in an array so that the sum of the two numbers equals a given number, and for the sake of simplification, we assume that there must be such a group or more of the required solutions in this array.Analysis and solution of "solution one"The co

a prime number: only 1 * prime number = prime number! All prime numbers from 1 to 20: t = {2, 3, 5, 7, 11, 13, 17, 19 }. Set X to any prime number in T. Then, the possible values of S are: {2 + 1, 3 + 1, 5 + 1, 7 + 1, 11 + 1, 13 + 1, 17 + 1, 19 + 1}, I .e.: Ss = {3, 4, 6, 8, 12, 14, 18, 20} S = 3: 3 is not in the [4, 38] Set, exclude; S = 4: 4 =

Welcome reprint, Reprint please indicate source: http://blog.csdn.net/alading2009/article/details/45080773Question 14th: Enter an array and a number that have been sorted in ascending order, and find two numbers in the array so that they are exactly the number entered. Requirements: Time complexity is O (n). If there are many pairs of numbers and equals the input

1. TitleConsecutive Numbers (find the number that appears consecutively)2. Address of the topichttps://leetcode.com/problems/consecutive-numbers/3. Topic contentWrite a SQL to find out that there are at least 3 consecutive numbers

There is a series of integers, the number of numbers is indefinite, a total of N, to find out the number of the most frequent (the original question is to find the number of occurrences greater than the N/2) What is the general algorithm for this problem? General algorithm Loop array,

Topic Overview We ask to find the number of numbers with the following properties (including the natural number of input n): First enter a natural number n (n≤1000), and then the natural number is processed according to the following method1. Not to make any treatment;2. Add a natural number to the left of it, but the natural number cannot exceed half of the or

Original question: Write a function to find any subset of 3 integers from a set of N integers that have a sum with the smallest absolute value,And analyze the time and space complexity of your function. The input to this function is a pointer or reference to an array of integers, along with the value of N.When N> = 3, the output is a 3-element array of integers, such that their sum has the smallest absolute value.When n For example, given the follow

1 /*************************************************************************2 > File name:38_numbersappearonce.cpp3 > Author:juntaran4 > Mail: [email protected]5 > Created time:2016 September 03 Saturday 10:50 32 seconds6 ************************************************************************/7 8#include 9 Ten //Judging the number binary from right to left the index bit is not 1 One BOOLIsbit (intNumintindex) A { -num = num >>index; - return(Num

The problem is described as follows: There are 250 million integers (these 250 million integers are stored in an array, and the array is placed in external memory or memory, without further specific instructions); Ask to find out the number of numbers that are not duplicated in these 250 million numbers; In addition, the available memory is limited to 600M; Req

Leetcode on a topic, although not difficult, but examined the data structure of a lot of knowledgeGiven an array of integers, find the numbers such that they add up to a specific target number.The function twosum should return indices of the numbers such that they add up to the target, where index1 must is Les S than Index2. Please note that your returned answers

method is available only if we can modify the input array, and the K number at the left of the array is the smallest K number (but this k number is not necessarily ordered), located in The numbers to the right of the number k are larger than the K numbers. Here is the solution 3 #include method Four, we find the algorithm of linear search, suitable for data

Before we wrote a function, written in a group of numbers have a number only appeared once, the other books have appeared 2 times, the idea is very simple, directly in turn or can find this number. See my previous blog post for details.Then let's take a look at the present question.The number of outputs in a group of 2

Find the first 40 numbers of the Fibonacci sequence. Features, 1th, 2 number 1, starting from the third number, the number is the sum of the preceding two numbers # # # The "C language" asks the first 40 numbers of the Fibonacci sequence. Features, 1th,

Select N numbers from 1-9 to Form N-digit numbers that are not repeated. Numbers are numbered from small to large. When you enter any number M, the specific question of the number corresponding to this number is as follows: Select N numbers from 1-9 to Form N-digit numbers

First,In an array except for a number , the other numbers appear two times. to use XOR or to solve#include using namespacestd;intMain () {intT; intn,m; while(cin>>t,t) {cin>>N; while(--T) {cin>>m; N=m^N; } printf ("%d\n", N); } return 0;}Extensions:In an array of integers, except for two digits , the other numbers appear two times. Http://www.cnblogs.com/youxin/p/3349834.htmldata: 1

we analyze: and the same as above the whole array xor, get a result, the value can be seen as the two number to find the difference or derived. For example, a group of numbers 1,2,3,1 1:00000001 1:00000001 2:00000010 3:00000011 xor: 00000001 The overall XOR value is certainly not equal to 1, then the bit is not 0, the bit is located in phase The same data, the b

Interview Question 3 (b): Do not modify the array to find duplicate numbersTitle: All numbers in an array of length n+1 are within the range of 1 to N, so the arrayA few numbers are duplicated. Please find any duplicate numbers in the array, but you cannot modify the inputAr

61. Find two numbers that appear only once in the array (array)Question: except two numbers in an integer array, the other numbers appear twice.Write a program to find the numbers that appear only once. The time complexity is O (n

Find the Duplicate number Given an array nums containing n + 1 integers where each integer is between 1 and N (inclusive), prove that at least one D Uplicate number must exist. Assume that there are only one duplicate number, find the duplicate one. Note:you must not modify the array (assume the array is read only). You must use only constant, O (1) Extra space. Your runtime complexity should i