September Challenge 2016
Faded Palindromes, Chef and digits of a number
October Challenge 2016
Chef and Three Dogs, Chef and Keyboard
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander
March Challenge 2017
Bear and Extra Number, Bandwidth of a matrix, (CH) Bear and Sorted Rows, Xenny and Alternating Tasks
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
April Challenge 2017
Dish Of Life, Similar Dishes
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
September Challenge 2017
Little Chef and Sums, Minimum Good Permutation, Sereja and Commands, Chef and Pick Digit
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
September Cook-Off 2017
Infinite OR Game, Statistics Construction, Subsequence Equality
October Cook-Off 2017
Chef and Employment Test, Chef and Weird Queries
September Lunchtime 2017
Chef and Cook-Off Contests
December Lunchtime 2017
Days in Month, Strange Function
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs
June Lunchtime 2018 Division 2
Summary Power, Counting Pretty Numbers
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