September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Weasel does Xor on Tree, Fill The Matrix, Little Chef and Sums
October Challenge 2017
Chef and a great voluntary Program, A Balanced Contest, Counter Test For CHEFSUM, Max Mex, Chef and Cycled Cycles, Chef and Magic Arrays
November Challenge 2017
Product on the segment by modulo , Villages and Tribes, Periodic Palindrome Construction, Lovers Gift, Chef goes Left Right Left, Chef and Subarray Queries, Chef Hates Palindromes
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out
Plinth-Enigma'19 LNMIIT Techfest - (Rated for all)
XOR! Wait for it, Sherlock and His Device, Jake and His Halloween challenge, Ross goes for Shopping, Return of the Gargoyle King, Summation over nCr
March Lunchtime 2019 Division 1
Corrupted Seven-Segment Display, GCD Subsequences
April Cook-Off 2019 Division 1
Doubly Increasing Path, Mystery Tree
May Challenge 2019 Division 1
Chef and Elephant Tree, Where to Build the Roads, Sonya and Gifts
September Challenge 2019 Division 1
Biladerim Icin, Chef Designed a Network, Power Sum, Dodgers, Doofish Set, Expected GCD, Fuzzy Linear Combinations
December Lunchtime 2021 Division 1
Optimal Sorting, Romantic Reversals, Sleep Technique
Vietnam