August Challenge 2020 Division 2
Subsequence Frequency Counting, Chefina and Strange Tree, Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP, Chef and Wedding Arrangements, Insanely Hard School Exams
September Challenge 2020 Division 1
Chefina and Swap, Chef and Trump Cards, Find XOR, Ada Matrix
July Lunchtime 2020 Division 2
Binary Concatenation , Maximum Candies, Chef and Steps
October Challenge 2020 Division 1
Inversions, Positive AND, Replace for X, D-Dimensional MST, Compress all Subsegments
June Challenge 2021 Division 1 (Unrated)
Minimum Dual Area, Shortest Route, Bitwise Tuples, Bella ciao, Dual Distance, Summer Heat, MathBuzz, Optimal Xor Set, Minimum Subtree Cover
United States