数字运算,判断一个数是否接近素数 A Niven number is a number such that the sum of its digits divides itself. For example, 111 is a Niven number because the sum of its digits is 3, which divides 111. We can also specify a number in another base b, and a number in base b is a Niven number if the sum of its digits divides its value. Given b (2 <= b <= 10) and a number in base b, determine whether it is a Niven number or not. Input Each line of input contains the base b, followed by a string of digits representing a positive integer in that base. There are no leading zeroes. The input is terminated by a line consisting of 0 alone. Output For each case, print "yes" on a line if the given number is a Niven number, and "no" otherwise. Sample Input 10 111 2 110 10 123 6 1000 8 2314 0 Sample Output yes yes no yes no
上传时间: 2015-05-21
上传用户:daguda
源代码\用动态规划算法计算序列关系个数 用关系"<"和"="将3个数a,b,c依次序排列时,有13种不同的序列关系: a=b=c,a=b<c,a<b=v,a<b<c,a<c<b a=c<b,b<a=c,b<a<c,b<c<a,b=c<a c<a=b,c<a<b,c<b<a 若要将n个数依序列,设计一个动态规划算法,计算出有多少种不同的序列关系, 要求算法只占用O(n),只耗时O(n*n).
上传时间: 2013-12-26
上传用户:siguazgb
The government of a small but important country has decided that the alphabet needs to be streamlined and reordered. Uppercase letters will be eliminated. They will issue a royal decree in the form of a String of B and A characters. The first character in the decree specifies whether a must come ( B )Before b in the new alphabet or ( A )After b . The second character determines the relative placement of b and c , etc. So, for example, "BAA" means that a must come Before b , b must come After c , and c must come After d . Any letters beyond these requirements are to be excluded, so if the decree specifies k comparisons then the new alphabet will contain the first k+1 lowercase letters of the current alphabet. Create a class Alphabet that contains the method choices that takes the decree as input and returns the number of possible new alphabets that conform to the decree. If more than 1,000,000,000 are possible, return -1. Definition
标签: government streamline important alphabet
上传时间: 2015-06-09
上传用户:weixiao99
课程安排,用拓扑排序实现 4、实现课程的拓扑排序。(选)(加) 问题描述:软件专业的学生要学习一系列课程,其中有些课程必须在其先修课程完成后才能学习,具体关系见下表: 课程编号 课程名称 先决条件 C1 程序设计基础 无 C2 离散数学 C1 C3 数据结构 C1,C2 C4 汇编语言 C1 C5 操作系统 C3 假设每门课程的学习时间为一学期,试为该专业的学生设计教学计划,使他们能在最短的时间内修完这些课程。
标签:
上传时间: 2014-12-06
上传用户:lixinxiang
用遗传算法解决城市的访问次序,可使其 旅行路线的总长度最短 可从该程序借鉴到其他应用
上传时间: 2013-12-30
上传用户:thinode
电力系统在台稳定计算式电力系统不正常运行方式的一种计算。它的任务是已知电力系统某一正常运行状态和受到某种扰动,计算电力系统所有发电机能否同步运行 1运行说明: 请输入初始功率S0,形如a+bi 请输入无限大系统母线电压V0 请输入系统等值电抗矩阵B 矩阵B有以下元素组成的行矩阵 1正常运行时的系统直轴等值电抗Xd 2故障运行时的系统直轴等值电抗X d 3故障切除后的系统直轴等值电抗 请输入惯性时间常数Tj 请输入时段数N 请输入哪个时段发生故障Ni 请输入每时段间隔的时间dt
上传时间: 2015-06-13
上传用户:it男一枚
已知n个城市之间的相互距离,现有一个推销员必须遍访这n个城市,并且每个城市只能访问一次,最后又必须返回出发城市。如何安排他对这些城市的访问次序,可使其旅行路线的总长度最短?
标签: 城市
上传时间: 2013-12-06
上传用户:wyc199288
已知n个城市之间的相互距离,现有一个推销员必须遍访这n个城市,并且每个城市 只能访问一次,最后又必须返回出发城市。如何安排他对这些城市的访问次序,可使其 旅行路线的总长度最短?
标签: 城市
上传时间: 2013-12-28
上传用户:三人用菜
模拟的一个交通指南,找最短的公交路线及最省时间的公交路线
标签: 模拟
上传时间: 2014-01-17
上传用户:小草123
csharp开发,为乘铁路出行的用户提供路线信息,计算特定路线的距离、两城镇间不同路线的数量并找出最短路线
标签: csharp
上传时间: 2014-01-20
上传用户:sk5201314