EkupaiHacker robot Ekupai is trying to hack a supercomputer. He needs a cheat code X to hack this computer...
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The Perfect CollectionGiven an array A of N integers, if we choose any K of these integers and calculate their bitwise XOR...
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EasyThis problem is very easy. As my mood is not so good, I will not elaborate the statement unnecessari...
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Train HijackYou and your friend Daneliya Tuleshova are planning to hijack a train. Your friend will go inside a...
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Find NSUPSGiven a string $s$, find the number of subsequence in $s$ which forms the word “NSUPS”. A subsequenc...
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Convert String Into PalindromeA palindrome is a word, number, phrase, or other sequence of characters which reads the same backwar...
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A Journey Towards OneGiven N. You can perform 3 types of operations: Increase N by 1. Decrease N by 1. Divide N by 2 (O...
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OCD Returns!This problem author has OCD (obsessive–compulsive disorder). One day his teacher gave him an array o...
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Burger KingEvery day, more than 11 million guests visit BURGER KING® restaurants around the world. And they do ...
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Harry Potter and the Vault of Gringotts“There was a break-in of Gringotts Wizarding Bank on 1 May, 1998, during the height of the Second Wi...
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Naming ConventionTony works in a multinational technology company named Voogle LLC. The employees of Voogle follow ce...
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Easy Sequence 2Let’s define a easy sequence F. Where $ F(1) = 1 $ $ F(2X) = F(X)^2 + 1 $ $ F(2X+1) = F(X) \times...
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LIDSWe all know about LIS ( Longest Increasing Sub sequence). The task to find the length of the longest...
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Counting MurgisEver since that wicked thief took away some of her murgis (hens, that is), Meena was ever anxious th...
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Penguins of MadagaskarYou all heard about the Penguins of Madagaskar. They work for the penguin kind and loves cuteness. O...
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Messy TableAkib is a very good student but his reading table is very messy. One Friday afternoon, Akib is sitti...
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I Hate Combinatorics!Rick and Morty are being hunted by the galactic government. They ran away to the cell dimension. The...
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Polygon Construction (Hard)Meera in going to picnic with her friends. They are going to have lots of fun. They will be doing va...
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Third DimensionMr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...
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No GCDYou are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb...
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Easy Sequence 1Let’s define an easy sequence F. Where $ F(1) = 1 $ $ F(2X) = F(X)^2 + 1 $ $ F(2X+1) = F(X) \time...
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The Game of RocksAlice and Bob have come up with a new game. Bob gives Alice a NxM grid that contains N rows and M c...
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Gaaner KoliThe protagonists of this problem are two great programmers of a certain institution Omanush and Ordi...
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Sticking PinsYou are sticking pins on a 2D board at N given coordinates. However, since you are not very good at ...
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Smart Feature Phone 2Alice worked in CIA. Right now he need to send an encrypted message to the headquarter(HQ) of CIA....
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Perseus and The New ChallengeThe life of princess Andromeda, the daughter of King Cepheus and Queen Cassiopeia of Ados, is in dan...
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Dominoes ForeverOnce when I was little, my father took me to a tobacco shop! It is surprising, but true. He asked th...
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Pathetic Interview IIYou all know about the story of Pathetic Interview-I. Today, I am sharing a story of my close friend...
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Alice in CandylandAlice came up with a new game. In this game called “Candy Quest”, there is a NxN size 2D grid. In ea...
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Subarray SumYou are given an array having N integers. You have to select at most K positions in the array and re...
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Maximum SumLittle Jimmy loves to play with numbers. One day he was playing with a number sequence. In his game,...
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Very Dirty StringStrings are difficult, most of the contest programmers say this and try to avoid string algorithms. ...
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