金甲虫的博客

Problem Description Crixalis - Sand King used to be a giant scorpion(蝎子) in the deserts of Kalimdor. Though he’s a guardian of Lich King now, he keeps the living habit of a scorpion like living u

原题描述Problem Description Ray 在数学课上听老师说，任何小数都能表示成分数的形式，他开始了化了起来，很快他就完成了，但他又想到一个问题，如何把一个循环小数化成分数呢? 请你写一个程序不但可以将普通小数化成最简分数，也可以把循环小数化成最简分数。Input 第一行是一个整数N，表示有多少组数据。 每组数据只有一个纯小数，也就是整数部分为0。小数的位数不超过

原题描述Problem Description Give you a lot of positive integers, just to find out how many prime numbers there are.Input There are a lot of cases. In each case, there is an integer N representing the

原题描述Problem Description Ignatius bought a land last week, but he didn’t know the area of the land because the land is enclosed by a parabola and a straight line. The picture below shows the area. Now

原题描述Problem Description Given a positive integer N, you should output the leftmost digit of N^N.Input The input contains several test cases. The first line of the input is a single integer T which

原题描述Problem Description The Joseph’s problem is notoriously known. For those who are not familiar with the original problem: from among n people, numbered 1, 2, …, n, standing in circle every mth is