Detect the part of code that can be used or not, but definitely is not required for the application.
Classify Git commits with deep learning
Auto-generate a PDF notebook from your source codes (useful for ACM-ICPC)
Write a large text on your GitHub profile, with your commits history (contribution graph).
Map coloring, using four colors
Algorithm Design, Data Structures, ACM-ICPC, and IOI
Apply Thatcher illusion on a set of face photos
Optical character recognition of Farsi and Arabic letters
Testsaz is a fast, minimal test-case generator system for ICPC style and IOI style problems.