May Challenge 2015
Devu and binary String, Devu and his three Hands, Chef and new recipe, Chef and Prime Divisors, Set Difference
June Challenge 2015
Sereja and Matrix Division, Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Anticommutative implication, Chef and String
July Challenge 2015
Chef and Cube, Na2a and lucky stone, Bread
May Cook-Off 2015
Devu and friendship testing, Devu and decorating birthday cake
January Long Challenge 2016
Rupsa and the Game, Churu and Balls, Devu and Perfume
February Challenge 2016
Chef and Strange Operations, Chef-Detective
May Challenge 2016
Laddu, Chef and Big Soccer, Forest Gathering, Chef and math, Chef and Balls
June Challenge 2016
Chef and Rectangle Array, Chef and Array and K
July Cook-Off 2016
Chef and Proportion, Chef and Numbers
May Challenge 2017
Courses in an university, Chef and Subsequences, Median of adjacent maximum numbers, Blocked websites, Chef and his daily routine, Gotham PD, Chef and Sub Array
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
IOPC 2017 (Rated)
The Birthday Tears, Max Out, Christmas Time
India