hdu 5615 Jam's math problem（十字相乘判定）

【hdu 5615 Jam's math problem（十字相乘判定）】的更多相关文章

HDU 5615 Jam's math problem

Jam's math problem Problem Description Jam has a math problem. He just learned factorization.He is trying to factorize ax^2+bx+c into the form of pqx^2+(qk+mp)x+km=(px+k)(qx+m).He could only solve the problem in which p,q,m,k are positive numbers.Ple…

hdu 5615 Jam's math problem（十字相乘判定）

d. Jam有道数学题想向你请教一下,他刚刚学会因式分解比如说,x^2+6x+5=(x+1)(x+5) 就好像形如 ax^2+bx+c => pqx^2+(qk+mp)x+km=(px+k)(qx+m) 但是他很蠢,他只会做p,q,m,kp,q,m,k为正整数的题目请你帮助他,问可不可以分解题意就是问一个一元二次方程能不能进行十字相乘的分解? s. 官方题解:第一道题比较简单,可以说是简单的模拟题,我们考虑到a,b,c都是10^9的,所以我们决定要把时间复杂度降下来, 对于每一个数,因为…

hdu 5615 Jam's math problem（判断是否能合并多项式）

方法一:由十字相乘相关理论我们能知道,如果要有p,k,q,m,那么首先要有解,所以b*b-4*a*c要>0,然而因为p,k,q,m是正整数,所以代表x1,x2都是有理数,有理数是什么鬼呢?就是解不带根号,我们知道有求根公式,其中2*a,-b都保证是自然数了,如果根号下b*b-4*a*c也保证是有理数我们就就能保证解是自然数,那么如何保证根号下b*b-4*a*c是有理数呢?那么b*b-4*a*c就是平方数 #pragma comment(linker, "/STACK:1024000000,…

Jam's math problem（思维）

Jam's math problem Submit Status Practice HDU 5615 Description Jam has a math problem. He just learned factorization. He is trying to factorize into the form of . He could only solve the problem in which p,q,m,k are positive numbers. Please hel…

BestCoder Round #70 Jam's math problem（hdu 5615）

Problem Description Jam has a math problem. He just learned factorization. He is trying to factorize ax^2+bx+cax2+bx+c into the form of pqx^2+(qk+mp)x+km=(px+k)(qx+m)pqx2+(qk+mp)x+km=(px+k)(qx+m). He could only solve the problem in which p,q,m,…

HDU 5055 Bob and math problem（结构体）

主题链接:http://acm.hdu.edu.cn/showproblem.php?pid=5055 Problem Description Recently, Bob has been thinking about a math problem. There are N Digits, each digit is between 0 and 9. You need to use this N Digits to constitute an Integer. This Integer need…