[lightoj P1306] Solutions to an Equation You have to find the number of solutions of the following equation: Ax + By + C = 0 Where A, B, C, x, y are integers and x1 ≤ x ≤ x2 and y1 ≤ y ≤ y2. Input Input starts with an integer T (≤ 10000), denoting th…

思路:看题就知道用扩展的欧几里得算法做!!! 首先我们可以求出ax+by=gcd(a,b)=g的一个组解(x0,y0).而要使ax+by=c有解,必须有c%g==0. 继而可以得到ax+by=c的一个组解x1=c*x0/g , y1=c*y0/g. 这样可以得到ax+by=c的通解为:                   x=x1+b*t;                   y=y1-a*t; 再就是要注意符号问题!!! 代码如下: #include<cstdio> #include<…

本题是极其裸的EXGCD AX+BY+C=0 给你a b c 和x与y的区间范围,问你整数解有几组 作为EXGCD入门,题目比较简单 主要需要考虑区间范围的向上.向下取整,及正负符号的问题 问题是这正负号判断考虑让我WA无数次 我好菜阿 补充:关于使用扩展欧几里德算法解决不定方程的办法 对于不定整数方程pa+qb=c,若 c mod Gcd(p, q)=0,则该方程存在整数解,否则不存在整数解. 上面已经列出找一个整数解的方法,在找到p * a+q * b = Gcd(p, q)的一组解p0,q…

Solutions to an Equation LightOJ - 1306 一个基础的扩展欧几里得算法的应用. 解方程ax+by=c时,基本就是先记录下a和b的符号fla和flb(a为正则fla为1,为负则fla为-1,flb相同),然后对a和b取绝对值.求出ax+by=gcd(a,b)的一组解x=ansx,y=ansy,那么只有当c是gcd(a,b)的倍数时原方程才可能有解.设g=gcd(a,b),通解是x=ansx*(c/g)*fla+k*b/g*fla,y=ansy*(c/g)*flb…

The Solutions of Nonlinear Equation 本文主要介绍几种用于解非线性方程$f(x)=0$的一些方法. (1) Bisection Method. 算法: step 1: 初始化$a,b(b>a)$,使$f(a),f(b)$异号. step 2: while (停止条件不满足) $p=a+\frac{b-a}{2}$: 若 $f(p)f(a)<0$,$b=p$:否则$a=p$. end while step 3: 返回的$p$为方程$f(x)=0$的解. 停止条件…

1306 - Solutions to an Equation    PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB You have to find the number of solutions of the following equation: Ax + By + C = 0 Where A, B, C, x, y are integers and x1 ≤ x ≤ x2 and y1 …

题目链接:http://lightoj.com/volume_showproblem.php?problem=1306 You have to find the number of solutions of the following equation: Ax + By + C = Where A, B, C, x, y are integers and x1 ≤ x ≤ x2 and y1 ≤ y ≤ y2. Input Input starts with an integer T (≤ ),…

http://acm.hust.edu.cn/vjudge/contest/view.action?cid=27938#problem/E 题目大意:Given, n, count the number of solutions to the equation x+2y+2z=n, where x,y,z,n are non negative integers. 解题思路:只对一个枚举由此推算出另外两个的种类,千万不要都枚举!!! #include<iostream> #include<…

Solve a given equation and return the value of x in the form of string "x=#value". The equation contains only '+', '-' operation, the variable x and its coefficient. If there is no solution for the equation, return "No solution". If th…

Solve a given equation and return the value of x in the form of string "x=#value". The equation contains only '+', '-' operation, the variable x and its coefficient. If there is no solution for the equation, return "No solution". If th…

Solve a given equation and return the value of x in the form of string "x=#value". The equation contains only '+', '-' operation, the variable xand its coefficient. If there is no solution for the equation, return "No solution". If the…

Solve a given equation and return the value of x in the form of string "x=#value". The equation contains only '+', '-' operation, the variable x and its coefficient. If there is no solution for the equation, return "No solution". If th…

Solve a given equation and return the value of x in the form of string "x=#value". The equation contains only '+', '-' operation, the variable x and its coefficient. If there is no solution for the equation, return "No solution". If th…

[LeetCode]640. Solve the Equation 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/solve-the-equation/description/ 题目描述: Solve a given equation and return the value of x in the…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=2578 Dating with girls(1) Description Everyone in the HDU knows that the number of boys is larger than the number of girls. But now, every boy wants to date with pretty girls. The girls like to date with…

Alexander Grothendieck (German: [ˈɡroːtn̩diːk]; French: [ɡʁɔtɛndik]; 28 March 1928 – 13 November 2014[1]) was a French[2][3][4] mathematician, born inGermany, raised and living primarily in France, and who spent much of his working life stateless, wh…

Dating with girls(1) Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 3954    Accepted Submission(s): 1228 Problem Description Everyone in the HDU knows that the number of boys is larger than th…

Description Colossal! — exclaimed Hawk-nose. — A programmer! That's exactly what we are looking for. Arkadi and Boris Strugatsky. Monday starts on Saturday Reading the book "Equations of Mathematical Magic" Roman Oira-Oira and Cristobal Junta fo…

Description Math Olympiad is called “Aoshu” in China. Aoshu is very popular in elementary schools. Nowadays, Aoshu is getting more and more difficult. Here is a classic Aoshu problem: ABBDE __ ABCCC = BDBDE In the equation above, a letter stands for…

Description Math Olympiad is called “Aoshu” in China. Aoshu is very popular in elementary schools. Nowadays, Aoshu is getting more and more difficult. Here is a classic Aoshu problem: ABBDE __ ABCCC = BDBDEIn the equation above, a letter stands for a…

title: Equations 数学 杭电1840 tags: [数学] 题目链接 Problem Description All the problems in this contest totally bored you. And every time you get bored you like playing with quadratic equations of the form aX2 + bX + c = 0. This time you are very curious to…

Dating with girls(1) Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2127    Accepted Submission(s): 730 Problem Description Everyone in the HDU knows that the number of boys is larger than the…

Dating with girls(1) Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3869    Accepted Submission(s): 1196 Problem Description Everyone in the HDU knows that the number of boys is larger than the…

latex Table of Contents 1. Presentation/Slides with Beamer 2. Drawing in LaTex With TikZ 3. Tracked changes and comments with todonotes 4. Latex 4.1. nomenclature in article 4.2. section without number 4.3. page break 4.4. defining a new environment…

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B - Dating with girls(1) Everyone in the HDU knows that the number of boys is larger than the number of girls. But now, every boy wants to date with pretty girls. The girls like to date with the boys with higher IQ. In order to test the boys ' IQ, Th…

Dating with girls(1) Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 5709    Accepted Submission(s): 1855 Problem Description Everyone in the HDU knows that the number of boys is larger than the…

黎曼曲面Riemann Surface A Riemann surface is a surface-like configuration that covers the complex plane with several, and in general infinitely many, "sheets." These sheets can have very complicated structures and interconnections (Knopp 1996, pp. 9…

B. Little Dima and Equation time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little Dima misbehaved during a math lesson a lot and the nasty teacher Mr. Pickles gave him the following proble…

Codeforces Round #262 (Div. 2) B B - Little Dima and Equation B. Little Dima and Equation time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Little Dima misbehaved during a math lesson a lot a…