February Challenge 2017
Eugene and big number, Chef and Yoda, Chef and His Apartment Dues, Chef and his Best Friend, Interval Game, Chef and Triangles
April Challenge 2017
Chef and Digits, (CH) Serejs and Billiards, Bear and Random Grid, Chef and Divisor Tree, Stable market, Heavy-Light Decomposition, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
May Challenge 2017
Chef and his daily routine
April Cook-Off 2017
Bear and Candies 123, Bear and AB
June Cook-Off 2017
Ada and crayons, SnackUp, Centeroid
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
September Mega Cook-Off 2018 Division 1
Make a Permutation, Learning Dishes, OneTwo
July Challenge 2018 Division 1
Gears, No Minimum No Maximum, Subway Ride, Reach Equilibrium, Tom and Jerry, Picking Fruit for Chefs, Pizza Delivery
June Lunchtime 2018 Division 2
Sort the Leaves, Permutation Composition Queries, Summary Power, Counting Pretty Numbers
October Challenge 2019 Division 1
Even Edges, Faulty System, (Challenge) Maximizing LIS, Array Modification, Chef and Maximum Star Value, Bacterial Reproduction, Queries on Matrix
July Challenge 2020 Division 1
LCM Constraints, Chefina and Swaps, Easy Geo xD, Chef and Dragon Dens, Missing a Point, Doctor Chef, Weird Product, Expected Repetitions, Expected Spanning Trees, (Challenge) Dynamic Hull
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