这个话题.简单的数学. 对于函数,f(x)=5*x^13+13*x^5+k*a*x,输入k,对于休闲x,一个数字的存在a,使f(x)是65可分. 对于休闲x. 因此,当x = 1时间,f(x) = 18 + a* k.满足被65整除. 也就是(18 + a * k)% 65 = 0. 所以,一切都非常easy了. 以下的是AC的代码: #include <iostream> using namespace std; int main() { int k; while(cin >>…

分析:裴蜀定理,a,b互质的充要条件是存在整数x,y使ax+by=1.存在整数x,y,使得ax+by=c.那么c就是a,b的公约数. 如果存在数a ,由于对随意x方程都成立.则有当x=1时f(x)=18+ka;有由于f(x)能被65整除,所以f(x)=n*65.即18+ka=n*65有整数解则说明如果成立. ax+by = c的方程有整数解的一个充要条件是:c%gcd(a, b) == 0.然后枚举直到(65*n-18)%k == 0. #include<iostream> using nam…

专门为杭州电50周年礼事 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 7236    Accepted Submission(s): 3936 Problem Description 也许你以前牢骚满腹 也许你依旧心怀忧伤 也许你近在咫尺 也许你我天各一方 对于每个学子 母校 永远航行在 生命的海洋 今年是我们杭电建校五十周年,这是…

A hard puzzle Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 51690 Accepted Submission(s): 18916 Problem Description lcy gives a hard puzzle to feng5166,lwg,JGShining and Ignatius: gave a and b,ho…

我要参加全国软件设计大赛C/C++学生语言组,前一个假设<C训练和演习,并总结手>没看完,请阅读上述并根据所作的训练,然后做下面的练习. 门户:http://blog.csdn.net/liuqiyao_01/article/details/8477666 杭电acm阶段之理工大版 [671原创.欢迎转载] 下面题均为杭电acm网页的题号 首页http://acm.hdu.edu.cn/ 题库入口vol=1">http://acm.hdu.edu.cn/listproblem.…

http://acm.hdu.edu.cn/showproblem.php? pid=3177 Crixalis's Equipment Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2562    Accepted Submission(s): 1056 Problem Description Crixalis - Sand Kin…

http://acm.hdu.edu.cn/showproblem.php?pid=1372 Knight Moves Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 6439    Accepted Submission(s): 3886 Problem Description A friend of you is doing res…

Wooden Sticks Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 12157    Accepted Submission(s): 5036 Problem Description There is a pile of n wooden sticks. The length and weight of each stick a…

Binary Number Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 1287    Accepted Submission(s): 807 Problem Description For 2 non-negative integers x and y, f(x, y) is defined as the number of di…

也可以看看GCD Time Limit: 1000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 11122    Accepted Submission(s): 4696 Problem Description 有三个正整数a,b,c(0<a,b,c<10^6),当中c不等于b.若a和c的最大公约数为b,现已知a和b,求满足条件的最小的c.   Input 第一行…