Special 21 Special 21 Special 21 is a bundle of contests on different topics each day for all-round development and preparation which keeps you engaged in your quarantine time and meanwhile prepares you to face the big shots easily. The Special 21 contest has already begun and will end on 15th April. Be ready for daily challenges sharp at 9 pm for the next 21 days. Day 1 : Mathematics Contest 1 Go Day 2 : Arrays Contest 1 Go Contest 2 Go Day 3 : Matrix Contest 1 Go Day 4 : Searching Contest 1 Go Contest 2 Go Day 5 : Sorting Contest 1 Go Day 6 : Strings Contest 1 Go Day 7 : Bit Magic Contest 1 Go Day 8 : Recursion Contest 1 Go Day 9 : Hashing Contest 1 Go Day 10 : Linked List Contest 1 Go Day 11 : Stack Contest 1 Go Day 12 : Queue and Dequeue Contest 1 Go Day 13 : Tree I Contest 1 Go Day 14 : Tree II Contest 1 Go Day 15 : Binary Search Tree Contest 1 Go Day 16 : Heap Contest 1 Go Day 17 : Graph Contest 1 Go Day 18 : Greedy Contest 1 Go Day 19 : Backtracking Contest 1 Go Day 20 : Dynamic Programming Contest 1 Go Day 21 : Trie and Segment Tree Contest 1 Go Last Updated : 28 Mar, 2020 Share your thoughts in the comments Add Your Comment Please Login to comment...