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2024A - Profitable Interest Rate was authored and prepared by Helen Andreeva with Artyom123

2024B - Buying Lemonade was authored by Endagorion and prepared by sevlll777

2023A - Concatenation of Arrays was authored and prepared by Mangooste

2023B - Skipping was authored and prepared by adepteXiao

2023C - C+K+S was authored and prepared by yunetive29

2023D - Many Games was authored and prepared by Tikhon228

2023E - Tree of Life idea by isaf27, solution and preparation by Ormlis

2023F - Hills and Pits was authored and prepared by glebustim with vaaven