how to find out owns 1 800 number

said that he could use the Inverse thinking of the binary method to do this, for example, 2-> 4-> 8-> 16-> 32-> 64-> 100. The span is getting bigger and bigger, it may take up to 30 times. Although this method is not the desired result, it provides us with an inspiration that we can find a suitable degree. For example, if you can directly find a building and fail to return, you can save a lot of floors. Th

http://www.51nod.com/onlineJudge/questionCode.html#!problemId=1393The method is fascinating. Also looked at other people's thinking to come out.First consider turning 0 all into-1. Then a prefix is counted and expressed in sum[i].Then the substring starting from the starting point is valid as long as the value of Sum[i] equals 0.If the substring starting point is not 0, then as long as two occurrences of sum[i], the two values must be a valid substrin

I. Topics and Requirements Given a positive integer in decimal, write down all integers starting with 1, to N, and then count the number of "1" that appears. Requirement: Write a function f (n) to return the number of "1" occurrences between

Rough gave the analysis, recently tired, will be improved later. The topic includes three small questions, from simple to complex: 1, if only one appears once, to investigate the nature of the XOR, is if the same number and their own or the result of the work is zero, then loop through the array, the elements in the array to do all the different or operation, then two times the

Topic Description: Kiss them!! Our foreign friends yz these days are always bad, junior high School Olympiad has a topic has been bothering him, hereby he sent to JOBDU for help letter, hope to help him. The question is: Find the number of occurrences of 1 in a 1~13 integer and figure out how many

Find the prime number between 1~n Difficulty level: A; run time limit: 1000ms; operating space limit: 256000KB; code length limit: 2000000B Question Description The number of primes is greater than 1 and cannot be divisible by oth

The specific topic is this: Select n numbers from the 1--9, make up the number of n digits that are not duplicated, numbering from small to large, and when you enter any number m, you can find the number corresponding The number

TopicAn array of size n, in which the number belongs to the range [0, n-1], has indeterminate repeating elements, finds at least one repeating element, requires O (1) space and O (n) time.Idea OneLooking for duplicate elements, it is easy to think of creating a hash table to complete, iterating through the array to map each element into a hash table. If this elem

Title DescriptionThe size of any two adjacent elements in array a differs by 1, and is given the array A and target integer t to find the position of T in array A.Thinking of solving problemsFor the target T, start with the current position A[index] comparison, the next possible position is index = ABS (T-a[index]), because to find all the positions, so

Enter an integer to find the number of binary 1. Consider the point of knowledge: How to ask for negative numbers, because the computer is stored in a complement of the form of storing a number. Because positive source code, anti-code, complement are the same, do not consider. But negative numbers will have to be consi

#include --------------------------------------------------------------------------------------------------------------- ------------------------------------- There is a better solution: "The beauty of programming" reading notes-"to find the number of binary 1" http://blog.csdn.net/justpub/article/details/2292823 The beauty of programming--Microsoft technical

Meaning: for example, if the number of 1 to 10 contains 1 and 10, the total number of 1 is 2. Use the following method: First, a problem is solved: given a number, the number of

Someone asked me a question yesterday ~ In the 500 Integers of 500, find the number of continuous addition equal to 500? In fact, this is a very simple interview question. Why do some people prefer not to solve it by themselves? I think the most important thing is that many people do not like to use their brains. I have offended many people. Haha. Brief Analysis: int [] X = {

All numbers from 1 to n exist in array a [n-1], except for one number removed, to find the number of missing. # Include Find the number of missing in

This article mainly introduces how to find the position and number of character 1 from a string in python, which is helpful for learning Python string operations, you can refer to the example in this article to obtain the position of a character in the string and the total number of times it appears. When implementing

Label: data for Ar algorithm size on Har computerThere are 1 to 10 W of the 10 W number, remove 2 and disrupt the order, how to find the two numbersDescription: there are 1 to 10 W numbers, remove 2 and disrupt the order, and how to find the two numbers.

In "The beauty of programming" there is a section on how to find a byte of unsigned integer variable binary representation of the number of 1 , mainly refers to four methods. Here's a quick introduction:1. method of finding redundancywhen converting a decimal number to a bin