May Challenge 2014
Compilers and Parsers, Chef-jumping, Chef and Strange Matrix, Stone, Little Elephant and Balloons
June Challenge 2014
Chef and Subarray, Guessing Game
November Challenge 2014
Distinct Characters Subsequence
April Challenge 2016
Chef and Ballons, Chef And Coloring, Chef And Magical Path, Help Watson Escape
July Challenge 2016
Andrash and Stipendium, Chef and Segments, Chef and Tetris, Chef and Robots Competition, Chefland and Electricity
September Challenge 2016
Chef and calculation, Faded Palindromes, Dividing Machine, Chef and digits of a number
December Challenge 2016
Train Partner, Kth Max Subarray, Kirito in labyrinth, Edit Distance Revisited, Roses for Alexey, Our Base is Under Attack, Bear and Three Colours
September Challenge 2017
Chef and Pick Digit, Little Chef and Sums, Fill The Matrix, Weasel does Xor on Tree, Minimum Good Permutation, Sereja and Commands
August Challenge 2018 Division 1
Coordinate Compression , Modular GCD, Interactive Matrix, Lonely Cycles
September Challenge 2018 Division 1
AND Square Subsegments, Table Game, Bad Shuffle
Romania