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
系统辨识及matlat仿真书里源程序非常好用)
上传时间: 2015-06-13
上传用户:yuzsu
这是一个关于机器人的路径算法(vfh算法)在matlab中的仿真。
上传时间: 2015-06-13
上传用户:ecooo
Connection的代理类,Statement的代理类,ResultSet的代理类.
标签: Connection 代理
上传时间: 2015-06-13
上传用户:pompey
两位十进制数的四则运算,用菜单控制,减法支持负数,除法有8位小数。
上传时间: 2014-01-13
上传用户:semi1981
=== === =时钟20:6=== === === == 应先初始化状态寄存器 tx1714 EQU 7FFH PA EQU 05H PB EQU 06H PC EQU 07H PD EQU 20H IAR EQU 00H 间接寻址寄存器 TMR0 EQU 01H 定时器 STATUS EQU 03H 状态寄存器 BSR EQU 04H bank选择寄存器 PORTA EQU 05H I/0端口寄存器 PORTB EQU 06H I/0端口寄存器 PORTC EQU 07H I/0端口寄存器 PORTD EQU 20H I/0端口寄存器 PULL EQU 21H PULL-High上拉寄存器 WAKEUP EQU 22H 唤醒控制寄存器--被用来设定watchdog允许和禁止 IRQM EQU 23H 中断屏蔽寄存器 IRQF EQU 24H 中断标志寄存器 WDTSEL EQU 25H
上传时间: 2013-12-13
上传用户:chfanjiang
该文详细介绍PS/2协议,和基于该协议的鼠标和键盘通信规范
上传时间: 2014-09-11
上传用户:1051290259
ftp网络传输.通过ftp协议下载网络文件内容的java程序.
上传时间: 2013-12-13
上传用户:xuan‘nian
DM9008-DS-F02-113000 的pdf文档
上传时间: 2015-07-13
上传用户:qq1604324866
这是一个用来调试驱动开发的一个调试器,可以编译和调试基于NDIS机制的驱动开发。
上传时间: 2015-07-13
上传用户:515414293