Missing tasks

[mraron]

• Most ceoi years (hungarian statements: http://tehetseg.inf.elte.hu/ceoi/ceoi_feladatok.php, tests http://ceoi.inf.elte.hu/)
• Ejoi 2023, 2024
• egoi: https://github.com/zehnsechs/egoi-2024-testdata https://github.com/Kodsport/egoi23-testdata
• older nt tasks