Sphere Online Judge

SPOJ Problem Set (classical)

1163. Java vs C ++

Problem code: JAVAC

Apologists of Java and C++ can argue for hours proving each other that their programming language is the best one. Java people will tell that their programs are clearer and less prone to errors, while C++ people will laugh at their inability to instantiate an array of generics or tell them that their programs are slow and have long source code.

Another issue that Java and C++ people could never agree on is identifier naming. In Java a multiword identifier is constructed in the following manner: the first word is written starting from the small letter, and the following ones are written starting from the capital letter, no separators are used. All other letters are small. Examples of a Java identifier are javaIdentifier, longAndMnemonicIdentifier, name, nEERC.

Unlike them, C++ people use only small letters in their identifiers. To separate words they use underscore character ‘_’. Examples of C++ identifiers are c_identifier, long_and_mnemonic_identifier, name (you see that when there is just one word Java and C++ people agree), n_e_e_r_c.

You are writing a translator that is intended to translate C++ programs to Java and vice versa. Of course, identifiers in the translated program must be formatted due to its language rules — otherwise people will never like your translator.

The first thing you would like to write is an identifier translation routine. Given an identifier, it would detect whether it is Java identifier or C++ identifier and translate it to another dialect. If it is neither, then your routine should report an error. Translation must preserve the order of words and must only change the case of letters and/or add/remove underscores.


The input file consists of several lines that contains an identifier. It consists of letters of the English alphabet and underscores. Its length does not exceed 100.


If the input identifier is Java identifier, output its C++ version. If it is C++ identifier, output its Java version. If it is none, output 'Error!' instead.




Added by:Camilo Andrés Varela León
Time limit:1s
Source limit:50000B
Memory limit:256MB
Cluster: Pyramid (Intel Pentium III 733 MHz)
Languages:All except: ERL JS NODEJS PERL 6
Resource:Northeastern Europe 2006

hide comments
2014-07-26 07:55:52 Navneet M Kumar
Getting wa .
DO we have to stop the input at '=' ??
or the newline character
2014-07-15 19:55:28 Yash
How to stop inputting in Java....readLine() till where??
How to know when input stops?
2014-07-10 05:41:49 Sahil Dua
AC in 1st go!
Mayur's test cases helped a lot. Just cover those cases and you're done :)
Thanks Mayur
2014-07-05 03:18:10 Shubham Singh
can't we use jump statement like goto in spoj or what?? I've tried all possible test case and my solution is correct. And on my compile its showing no error or warning, but in submission i'am getting seg. fault error.... someone help me
2014-06-28 17:47:04 PeacefulWarrior

GOT AC !!! :D
challenging test cases
_a or a_ or a__b =>error
2014-06-18 08:42:32 somil garg
how to end the input
2014-06-17 03:42:07 ken
even better here's a link to the code,
2014-06-17 03:40:57 ken
getting the wrong answer, why?
import re

[snip -- "1. Don't post any source code here."]

Last edit: 2014-06-17 05:52:30
2014-06-11 09:45:55 akshay goel
amazing question
but code quite long
2014-05-30 04:44:34 GAURAV CHANDEL
the problem is there is no problem and still WA!
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