July Challenge 2016
Chefland and Electricity, Andrash and Stipendium
April Challenge 2018 Division 2
Chef and Array (Challenge), Vaibhav and Ministers, Cutting Plants, Weight of Numbers, Highway Crossing, Count Good Prefixes, Average of Pairs, Workers
September Challenge 2018 Division 1
AND Square Subsegments, Sasha and Photos, Table Game, Bad Shuffle
October Challenge 2018 Division 1
Appy and Balloons , Chef and Surprise Chessboard, Minimize Digitsum, Beautiful Bricks
June Lunchtime 2018 Division 2
Sort the Leaves, Permutation Composition Queries, Summary Power, Counting Pretty Numbers
April Challenge 2019 Division 1
Playing with Numbers, Subtree Removal
April Lunchtime 2019 Division 1
Dream Problem, Firdavs and Planet F, Minimum Sum, Chef Rami and Inventions
Bulgaria