The programs, which you are testing, must be named task_quick.cpp and task_slow.cpp and must be in the same directory in which is the checker.

The test generator must be named task_test_generator.cpp and also must be in the same directory.

The result of the generator is saved in random.in. The result of task_slow.cpp is saved in task_slow.out and the result of task_quick.cpp is in task_quick.out.

Once all of the files are named like the ways explained above and checker.cpp is compiles, all you need to is to open terminal and write:

./checker

Then you must write the name of the problem. In the example it it park. The output is something like this:

Problem name: park

*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi*esi

Tests passed: 441
Find difference at line: 0
Correct answer: 0
Your answer:

Every symbol means that the output of task_quick.cpp and task_slow.cpp is the same. The program stops when there is some difference so you can see which program is wrong and why.

There are three types of error:

• Find difference at line:
• Your output is shorter than the correct output.
• Your output is longer than the correct output.