CF1450H2 - Multithreading (Hard Version)
CF1379F2 - Chess Strikes Back (Hard Version)
CF Round 635 Div.1 Chiori and Doll Picking (Hard Version)
CF1393E2 - Twilight and Ancient Scroll (Harder Version)
CF1217F - Forced Online Queries Problem
CF1510H - Hard Optimization
CF1514E - Baby Ehab's Hyper Apartment
CF1515G - Phoenix and Odometers
CF1516E - Baby Ehab Plays With Permutations
CF1519F - Chests and Keys