Description We know that if a phone number A is another phone number B’s prefix, B is not able to be called. For an example, A is 123 while B is 12345, after pressing 123, we call A, and not able to call B. Given N phone numbers, your task is to find…

In 1949 the Indian mathematician D.R. Kaprekar discovered a class of numbers called self-numbers. For any positive integer n, define d(n) to be n plus the sum of the digits of n. (The d stands for digitadition, a term coined by Kaprekar.) For example…

Description Roger Wilco is in charge of the design of a low orbiting space station for the planet Mars. To simplify construction, the station is made up of a series of Airtight Cubical Modules (ACM's), which are connected together once in space. One…

The improved Quicksort method of the present invention utilizes two pointers initialized at opposite ends of the array or partition to be sorted and an initial partition value Pvalue located at the center of the array or partition. The value at each…

Mine Number Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描述 Every one once played the game called Mine Sweeping, here I change the rule. You are given an n*m map, every element is a '*' representing a mine, or a '.' representing any other…

原题链接:http://acm.hdu.edu.cn/showproblem.php?pid=1005 主要内容: A number sequence is defined as follows: f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7. Given A, B, and n, you are to calculate the value of f(n). 看到这样的公式很容易想到递归调用求解,但是在本题中n的取…

The number of steps nid=24#time" style="padding-bottom:0px; margin:0px; padding-left:0px; padding-right:0px; color:rgb(83,113,197); text-decoration:none; padding-top:0px"> Time Limit: 1000ms   Memory limit: 65536K  有疑问?点这里^_^ 题目描写叙述 Mary…

Give Me the Number Time Limit: 2 Seconds                                     Memory Limit: 65536 KB                             Numbers in English are written down in the following way (only numbers less than 109 are considered). Number  abc,def,ghi…

A Number Puzzle Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 938    Accepted Submission(s): 276 Problem Description Lele 最近上课的时候都很无聊,所以他发明了一个数字游戏来打发时间.这个游戏是这样的,首先,他拿出几张纸片,分别写上0到9之间的任意数字(可重复写…

Mine Number 题目:http://acm.sdut.edu.cn/sdutoj/problem.php? action=showproblem&problemid=2410 Time Limit: 1000ms Memory limit: 65536K 有疑问?点这里^_^ 题目描写叙述 Every one once played the game called Mine Sweeping, here I change the rule. You are given an n*m ma…