This repository simply contains all the test cases for lab $X. .in files are the input for the program while .out is the correct output when run.
To add a test case, create a pull request with a two new files: X.in and X.out, where X is your GitHub username plus a number starting from 1 to however many test cases you decide to add. This is to avoid any conflict in naming files. For example, if this is your first test case and your username is torvalds, create two files called torvalds1.in and torvalds1.out. The next time you add another test case, it would be called torvalds2.in and torvalds2.out.