April Challenge 2020 Division 2
Squared Subsequences, Strange Number, COVID Pandemic and Long Queue, Sell All the Cars, Ready Bitwise, Unit GCD
August Challenge 2020 Division 2
Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP
September Challenge 2020 Division 2
Find XOR, Coronavirus Spread 2, Ada Matrix, Divide Candies, Rotate the Polyline, Chef and Trump Cards, A Problem on Sticks, Chefina and Swap
October Challenge 2020 Division 1
Village Road Network, Adding Squares, Compress all Subsegments, Replace for X, Rooted Minimum Spanning Tree, Positive AND, Inversions, D-Dimensional MST
December Challenge 2020 Division 1
Positive Prefixes, Even Pair Sum, String Operations, Permutations, Calculus, Square Root of LCA Convolution, Hail XOR
May Challenge 2021 Division 1 (Unrated)
Xor Equality, Tic Tac Toe
September Challenge 2021 Division 1 (Unrated)
XOR Equal, Shuffling Parities, Travel Pass
December Challenge 2021 Division 1 (Unrated)
Valleys and Hills, Rock Paper Scissors, Pyramid Traversal, Squares Counting
United States