• CF1A Theatre Square
• CF1B Spreadsheets
• CF1C Ancient Berland Circus
• CF2A Winner
• CF2B The least round way
• CF2C Commentator problem
• CF3A Shortest path of the king
• CF3B Lorry
• CF3C Tic-tac-toe
• CF3D Least Cost Bracket Sequence
• CF4A Watermelon
• CF4B Before an Exam
• CF4C Registration system
• CF4D Mysterious Present
• CF5A Chat Server's Outgoing Traffic
• CF5B Center Alignment
• CF5C Longest Regular Bracket Sequence
• CF5D Follow Traffic Rules
• CF5E Bindian Signalizing
• CF6A Triangle
• CF6B President's Office
• CF6C Alice, Bob and Chocolate
• CF6D Lizards and Basements 2
• CF6E Exposition
• CF7A Kalevitch and Chess
• CF7B Memory Manager
• CF7C Line
• CF7D Palindrome Degree
• CF7E Defining Macros
• CF8A Train and Peter
• CF8B Obsession with Robots
• CF8C Looking for Order
• CF8D Two Friends
• CF8E Beads
• CF9A Die Roll
• CF9B Running Student
• CF9C Hexadecimal's Numbers
• CF9D How many trees?
• CF9E Interesting Graph and Apples
• CF10A Power Consumption Calculation
• CF10B Cinema Cashier
• CF10C Digital Root
• CF10D LCIS
• CF10E Greedy Change
• CF11A Increasing Sequence
• CF11B Jumping Jack
• CF11C How Many Squares?
• CF11D A Simple Task
• CF11E Forward, march!
• CF12A Super Agent

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