cpdiff

Install using (globally since it's a CLI application):

npm install -g cpdiff

Compare your program's output to the accepted answer:

./your_program < data.in | cpdiff data.out

About

This is a simple utility for comparing the output of your program to the accepted answer or sample output. The name stands for competitive programming difference.

This program was developed because programs like sdiff or diff completely deform the layout when there are too many differences. This tool is meant to be specific for competitive programming.

Usage

Compare two files:

cpdiff file1 file2

Specify only one file, but pass the output of some other program as input (stdin).

some_program | cpdiff file1

Use - (dash) to specify which side of the comparison should receive input from stdin.

cpdiff - file1
# or
cpdiff file1 -

More competitive programming tools

Try my C++ runner. I use this program to quickly run C++ files as if they were scripts, using the simple c++ my_program.cpp command.

Contribution

Feature requests, issues, bug reports, pull requests are welcome.