Polygon: A hidden engine that drives competitive programming proficiency

Polygon is a collaborative platform for developing programming competition issues, widely used in Codeforces. It has powerful version control capabilities, integrated generators, inspectors and validators, simplifying problem creation and testing. The platform supports stress testing, test case management and solution verification to ensure correctness before release. It includes competition management tools, conflict resolution for multi-author editing, and metadata processing of problem constraints and tags. Polygon also supports interactive and non-interactive problem types, making it ideal for competitive programming.