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Competitive Programming Tools


This is a simple C++17 program that I like to use as a starting point for my projects.

It provides:

  • The entire standard library available without a namespace qualifier
  • A DB boolean that is true when a command line parameter is passed
  • A db function that prints its argument to stderr when DB is true
  • A PULSE statement that prints "Alive at line" and the line number to stderr when DB is true
  • A typedef of ll to long long
  • FOR, UPTO, IN, EACH, and PR (print) macros


This is a work in progress that is not ready for use yet. If I ever finish it, it will provide more robust printing than boilerplate.cpp. It may be incorporated into boilerplate.cpp in the future.


This is a shell script to assist in pre-submission testing of solutions. It is compatible with C++, C, Java, Python3, and Perl solutions at this time.

To use tester, install it to a location in your PATH (such as /usr/local/bin/) or to the directory with your source files (in which case it would of course be used with ./tester). Place files named [name].in and [name].out or [name].in1, [name].out1, [name].in2, [name].out2, etc., in the same directory as your program [name].cpp, [name].c, [name].java, [name].py, or [name].pl. Then run tester [filename] in this directory to automatically compile (where applicable) your code and test it against the cases provided. For C++, the extension can be omitted from the filename and .cpp will be assumed (./tester prob3.cpp and ./tester prob3 are equivalent).

If a command-line argument is provided to tester (for example, ./tester prob3 d), it will run in debug mode, which prevents tester from stopping after failed tests. The argument is also passed to your program, so if you're using boilerplate.cpp or another solution to check for a command line argument, you will get debug output from your program.

For each test case, tester displays your program's output (stderr and stdout are separated) and compares the output on stdout to the provided sample output using diff. The output of diff is also displayed; if the test passes, this will be blank. When not in debug mode, tester stops after a test fails.

Dependencies are, unsurprisingly, bash as well as g++ for C++, gcc for C, javac and java for Java, python3 for Python, and perl for Perl.

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