how to find inverse of modulo

Transfer from http://blog.csdn.net/houserabbit/article/details/41513745It's really good to write.Title Link: Http://codeforces.com/problemset/problem/487/CThe main idea: construct a 1~n arrangement so that n-prefix product pair n is a 0~n-1

Codeforces into C Prefix Product Sequence (Modulo inverse element + constructor), codeforces487c C. Prefix Product Sequencetime limit per test1 secondmemory limit per test256 megabytes Consider a sequence [A1, bytes,A2, middle..., middle ,...,AN].

Original code, anti-code, complement detailed This article explains the computer's original code, the inverse code and the complement. It also explores why to use the inverse code and the complement, and further demonstrates why the inverse code,

Expand Euclid, find a group of x, Y, making gcd (A, b) = d = A * x + b * yvoid exgcd (int a,int b,int &d,int &x,int &y) { if (b = = 0) { x = 1; y = 0; D = A; } else { exgcd (b,a%b,d,y,x); Y-= x* (A/b)

The main effect of the topic: Given two positive integers and, all the factors and the value of 9901 after the remainder. Analysis: It's easy to know, first to get the decomposition, then get, then All of the factors and expressions are as follows

BriefAshamed to say that although the first contact with the computer has learned the original code, anti-code and the complement of content, but recently relive the "What is this thing", it seems that the original only to deal with the exam. This

Transferred from Http://www.cnblogs.com/zhangziqiu/archive/2011/03/30/ComputerCode.html#!comments This article explains the computer's original code, the inverse code and the complement. It also explores why to use the inverse code and the

Before we begin, we introduce the 3 theorems:1. Multiplication inverse (also called the reciprocal in Wikipedia, of course, after mod p, is actually the countdown is not it?) ）:If Ax≡1 (mod p), and GCD (a,p) =1 (A and P coprime), then a

Reprint please specify the source [ametake All rights reserved]http://blog.csdn.net/ametake Welcome to seeIt took me one hours to finally get the multiplication inverse in mind. In view of my clumsy IQ, hold on to these records. In this column Ming

The previous period of time to carefully study the original code, anti-code, the complement of knowledge, and met today, did not think and forget, hey, good memory as bad writing ~.Later found a special introduction to this aspect of the article,