October Challenge 2015
Who dares to be a millionaire
December Challenge 2015
Oracle Devu and Longest Common Subsequence
March Challenge 2016
Palindromic substrings, maximize the sum
May Challenge 2016
Chef and Balls, Chef and Big Soccer, Laddu
June Challenge 2016
Chef and Coins Game, Devu and an Array, Chef And Binary Operation
July Challenge 2016
Andrash and Stipendium, Chef and Tetris, Chef and Robots Competition, Chefland and Electricity
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and digits of a number, Chef and calculation
November Challenge 2016
Task for Alexey, Count Permutations, Chef and squares
July Cook-Off 2016
Chef and Proportion, Chef and Numbers
June Lunchtime 2016
Collisions, One more weird game
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
February Challenge 2020 Division 2
School of Geometry, Hard Cash
India