Problem Description 把一个偶数拆成两个不同素数的和，有几种拆法呢？

Problem Description 话说，经过了漫长的一个多月，小明已经成长了许多，所以他改了一个名字叫“大明”。 这时他已经不是那个只会做100以内加法的那个“小明”了，现在他甚至会任意长度的正小数的加法。...

Problem Description The digital root of a positive integer is found by summing the digits of the integer. If the resulting value is a single digit then that d...

Problem Description Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N!

Problem Description A number sequence is defined as follows:

Problem Description As we know, Big Number is always troublesome. But it’s really important in our ACM. And today, your task is to write a program to calculat...

Problem Description This problem is also a A + B problem,but it has a little difference,you should determine does (a+b) could be divided with 86.For example ,...

Problem Description 有一群人，打乒乓球比赛，两两捉对撕杀，每两个人之间最多打一场比赛。 球赛的规则如下： 如果A打败了B，B又打败了C，而A与C之间没有进行过比赛，那么就认定，A一定能打败C。 如果A打败了B，B又打败了C，而且，C又...

Problem Description These days, I am thinking about a question, how can I get a problem as easy as

Problem Description 甜甜从小就喜欢画图画，最近他买了一支智能画笔，由于刚刚接触，所以甜甜只会用它来画直线，于是他就在平面直角坐标系中画出如下的图形：...