# ThoughtWorks 百年不变的面试题之 --- Merchant's Guide To The Galaxy

### ThoughtWorks 百年不变的面试题之 --- Merchant's Guide To The Galaxy

Code: https://github.com/zifeiniu/Merchants-Guide-To-The-Galaxy

我选的第三道，罗马数字转换。。

题是做完了，也算对了。但是你就别抄了，因为没过。。

挂的原因之一是没有写ReadMe，所以我现在多写点ReadMe.

还有因为有面向过程的思想，没有使用最新语法（这也算被拒的理由）。

今年不适合跳槽啊，先去葡萄城面试，前三关都过了，最后一关（传说中面试思想）三个boss围着小圆桌，问：你要是和上司吵架了怎么办？然后我就被拒了。

有意思的是面试前三关出的算法题，我都答出来了，但是答案和他们想的不一样。然后他们就说其实还可以这样XXXXXX，最后我发现他们给的答案逻辑都有问题，被我指出了，当然是没办法拒了。

想起来挺悲剧，我也是一个五十多人的软件公司的技术总监，居然连ThoughtWorks机试题都没过。

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最近朋友又去面试，我拿出来Push到Github上练练手。

大概讲一下，两个系统，一个问答系统 Analysis ，就是根据用户输入回答的。还有一个罗马数字转换系统RomanSystem，用户转换的。

记得要写ReadMe。

记得要写ReadMe。

记得要写ReadMe。

题目：

Description

You decided to give up on earth after the latest financial collapse left 99.99% of the earth's population with 0.01% of the wealth. Luckily, with the scant sum of money that is left in your account, you are able to afford to rent a spaceship, leave earth, and fly all over the galaxy to sell common metals and dirt (which apparently is worth a lot).

Buying and selling over the galaxy requires you to convert numbers and units, and you decided to write a program to help you. The numbers used for intergalactic transactions follows similar convention to the roman numerals and you have painstakingly collected the appropriate translation between them.

Numbers are formed by combining symbols together and adding the values. For example, MMVI is 1000 + 1000 + 5 + 1 = 2006. Generally, symbols are placed in order of value, starting with the largest values. When smaller values precede larger values, the smaller values are subtracted from the larger values, and the result is added to the total. For example MCMXLIV = 1000 + (1000 − 100) + (50 − 10) + (5 − 1) = 1944.

The symbols "I", "X", "C", and "M" can be repeated three times in succession, but no more. (They may appear four times if the third and fourth are separated by a smaller value, such as XXXIX.) "D", "L", and "V" can never be repeated. "I" can be subtracted from "V" and "X" only. "X" can be subtracted from "L" and "C" only. "C" can be subtracted from "D" and "M" only. "V", "L", and "D" can never be subtracted. Only one small-value symbol may be subtracted from any large-value symbol. A number written in Arabic numerals can be broken into digits. For example, 1903 is composed of 1, 9, 0, and 3. To write the Roman numeral, each of the non-zero digits should be treated separately. In the above example, 1,000 = M, 900 = CM, and 3 = III. Therefore, 1903 = MCMIII.

Input to your program consists of lines of text detailing your notes on the conversion between intergalactic units and roman numerals.

You are expected to handle invalid queries appropriately.

INPUT:

glob is I

prok is V

pish is X

tegj is L

glob glob Silver is 34 Credits

glob prok Gold is 57800 Credits

pish pish Iron is 3910 Credits

how much is pish tegj glob glob ?

how many Credits is glob prok Silver ?

how many Credits is glob prok Gold ?

how many Credits is glob prok Iron ?

OUTPUT

pish tegj glob glob is 42

glob prok Silver is 68 Credits

glob prok Gold is 57800 Credits

glob prok Iron is 782 Credits