Problem Description Write a program to determine the summation of several sets of integers.

Problem Description Write a program to read in a list of integers and determine whether or not each number is prime. A number, n, is prime if its only divisor...

Problem Description 我们定义如下矩阵: 1/1 1/2 1/3 1/2 1/1 1/2 1/3 1/2 1/1 矩阵对角线上的元素始终是1/1，对角线两边分数的分母逐个递增。 请求出这个矩阵的总和。...

在美丽的HDU，有一名大三的同学，他的速度是众所周知的，跑100米仅仅用了2秒47，在他跑步过程中会留下残影的哎，大家很想知道他是谁了吧，他叫仙人球，既然名字这样了，于是他的思想是单一的，他总是喜欢从一点出发，经过3次转折（每次向右...

Problem Description One day, winnie received a box and a letter. In the letter, there are three integers and five operations(+,-,*,/,%). If one of the three i...

Problem Description Give you a lot of positive integers, just to find out how many prime numbers there are.

Problem Description Everybody knows any number can be combined by the prime number. Now, your task is telling me what position of the largest prime factor. ...

Problem Description After the 32nd ACM/ICPC regional contest, Wiskey is beginning to prepare for CET-6. He has an English words table and read it every mornin...

Problem Description We once did a lot of recursional problem . I think some of them is easy for you and some if hard for you. Now there is a very easy probl...

Problem Description In this problem you need to make a multiply table of N * N ,just like the sample out. The element in the ith row and jth column should be ...