July Challenge 2020 Division 1
Chefina and Swaps, LCM Constraints, Weird Product, Doctor Chef, Chef and Dragon Dens, Missing a Point
August Challenge 2020 Division 1
Insanely Hard School Exams, Subsequence Frequency Counting, Chefina and Strange Tree, Smallest KMP, Chef Thanos Wants Perfect Balance, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Chef and Trump Cards, Ada Matrix, Divide Candies, Move the Coins - Creating Tests, Rotate the Polyline, Find XOR, Chefina and Swap
June Cook-Off 2020 Division 2
Banned Quotient, Checkpoints, Max Mex, Cache Hits, Per Capita Income
June Lunchtime 2020 Division 2
Maximum AND, Chef and Demonetisation, Increasing Decreasing, Gold Mining, Square Submatrices
October Challenge 2020 Division 1
Replace for X, Adding Squares, Compress all Subsegments, D-Dimensional MST, Rooted Minimum Spanning Tree, Positive AND, Inversions
January Challenge 2021 Division 1
Chef and Ants, Expected Number of SCCs
Coders' Legacy (Rated for all)
Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift
United States