Program submission guidelines

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A few rules MUST be followed for the submission system to recognize your output properly:

• Your program must return an exit code of zero (not returning an exit code in Java or C is the same thing as returning zero). Exit codes are checked to determine run-time errors, so if you properly exit your program and return specific codes, the system will think you have a run-time error.
  • That being said, C does not require a return value, and the system can handle this
• Unless otherwise directed, your program must read from standard input (scanf(), cin, System.in, etc.), and write to standard output (printf(), cout, System.out, etc.).
• The languages supported are listed below, along with the naming requirements.

Beyond that, a few notes and suggestions:

• If you want to mix printf() and cout in a C++ program, you have to be careful (they buffer their output in different places), you need to consider ios_base::sync_with_stdio.
• Some compilers automatically include certain header files, such as <stdio.h> and <stdlib.h>. The version of g++ on the server does not. If your code compiles fine for you, and does not on the server, then try making sure all your include files are correct.

Language specific information: note that the compilation command is dependent on the file extension of the first submitted file it recognizes. The execution command is more specific.

• C: typically compiled with gcc *.c; thus files can be named anything with a .c extension. The server has gcc version 5.4.0.
• C++: typically compiled with “g++ *.cpp”; thus files can be named anything with a .cpp extension. The server has g++ version 5.4.0.
• Java: typically compiled with javac Main.java; thus, the primary file must be Main.java. Java is OpenJDK version 1.8.0.
• Python: no compilation, due to being an interpreted language; typically executed with python main.py, so make sure you name your file correctly. The system has Python version 2.7.12 (run via python main.py) and Python version 3.5.2 (run via python3 main.py).
• PHP: no compilation, due to being an interpreted language; typically executed with php main.php, so make sure you name your file correctly. The first line in your program should be <?php and not #!/usr/bin/php. PHP version 7.0.22.
• Ruby: no compilation, due to being an interpreted language; typically executed with ruby main.rb, so make sure you name your file correctly. The Ruby version installed is ruby 2.3.1.