These problems really felt educative and i liked it : 2176D - Fibonacci Paths 2175D - Wishing Cards 2145D - Inversion Value of a Permutation 2107D - Apple Tree Traversing

Also, I would love to see these kinds of problem appear a little more this year : 2146D2 - Max Sum OR (Hard Version) 2149G - Buratsuta 3 2111E - Changing the String