Scribd
Upload
253 views2 pages

TopCoder Plugin for Coders

moj is a plugin for TopCoder that allows competitors to test solutions locally on example test cases from a problem statement. It inserts test code into submissions that runs the solution on examples and strips it for actual submission. It supports C++ and Java, offers improvements over TZTester like prettier output and double comparison, and makes adding custom test cases easier. Setup involves extracting jar files, configuring CodeProcessor and FileEdit in the TopCoder options menu, and specifying moj.moj as the processor class.

Uploaded by

Rachel Elliott
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
253 views2 pages

TopCoder Plugin for Coders

moj is a plugin for TopCoder that allows competitors to test solutions locally on example test cases from a problem statement. It inserts test code into submissions that runs the solution on examples and strips it for actual submission. It supports C++ and Java, offers improvements over TZTester like prettier output and double comparison, and makes adding custom test cases easier. Setup involves extracting jar files, configuring CodeProcessor and FileEdit in the TopCoder options menu, and specifying moj.moj as the processor class.

Uploaded by

Rachel Elliott
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as TXT, PDF, TXT or read online on Scribd
You are on page 1/ 2

moj 4.

15
========
Hello!
moj is a plug-in for the TopCoder arena that helps you compete
locally. When you open a problem, moj pulls the example test cases
from the problem statement and adds test code to your source
file. When you run your solution locally, it will be run on the
examples. The test code will be stripped when you submit your solution
in the Arena.
moj supports C++ and Java.
moj extends the functionality of TZTester. It requires CodeProcessor
(v2.0 recommended) and FileEdit, both of which are bundled with
moj. Improvements over TZTester are:
1. Output is prettier. Numbers are no longer surrounded by quotes. A
small summary is output after the results for individual cases. If
this summary does not appear, your program crashed while solving
one of the cases.
2a. Doubles and arrays of doubles are compared correctly (with an
absolute and relative tolerance of 1e-9).
2b. If the result is a double or array of doubles and your output is
not exact, moj will display the relative error of your output.
For example:
Test Case #0... PASSED (relative error 5.44969e-014)
Test Case #1... PASSED (relative error 5.68462e-012)
Test Case #2... PASSED (relative error 4.05691e-008)
Test Case #3... PASSED
All 4 tests passed!
The purpose of this feature is to alert you when your solution may
be insufficiently precise. Test case 2 passes because the absolute
error is small enough. However, it is a good indicator that your
solution is not precise enough for systests. Indeed, modifying the
code to use 80-bit floating-point variables changes the report to:
Test Case #0... PASSED (relative error 2.88899e-015)
Test Case #1... PASSED (relative error 3.82932e-015)
Test Case #2... PASSED (relative error 4.63219e-012)
Test Case #3... PASSED
All 4 tests passed!
3. Restructured test harness. Adding custom cases is much easier.
Placeholders are in place at the bottom of the test code, just
scroll down and uncomment one of them. You may also add additional
cases.
4. Java support. Through a hack (language auto-detection from source
code, based on heuristics) you may switch between Java and C++
after opening a problem.
5. Timing per test case.
6. Visual C++ support.
Setup:
1. Unzip the three .jar files in the moj package to a folder of your
liking.
2. Launch the Arena. Open the "Options" menu and select "Editors".
3. Add CodeProcessor, with entry point codeprocessor.EntryPoint. Add
codeprocessor.jar, moj.jar and fileedit.jar to the classpath.
4. In the "Editor preferences" window, select CodeProcessor then
"Configure". Under "Editor EntryPoint" write fileedit.EntryPoint.
Configure FileEdit.
I recommend checking off "Backup existing file then overwrite".
Included in the moj package are minimal code templates for C++ and
Java.
5. In the CodeProcessor configuration window, write moj.moj as the
processor class and verify. If all is good, you'll get 4 "found"
reports. Configure moj to your liking.
For bug reports, suggestions and questions, please use the member
contact feature at the TopCoder website or the forum thread. My handle
is lovro.

You might also like