Combinatorics Problems
Geometry ForeverFear no more, this is a problem of geometry! When Moyna was little, he had a math teacher named Shu...
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Meeting PlaceThere is an N*N grid where (r,c) denotes a cell number where r means row number, c means column numb...
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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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String PlayMilo has a string S of length L. Tutu picks a random prefix and Mota picks a random suffix of S. No...
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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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Obligatory IDPC ProblemThere are n people busy with arranging the upcoming Inter Department Programming Contest (IDPC) 2016...
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Compute the CombinationLet P = C(N,0) - C(N,1) + C(N,2) - C(N,3) + … + C(N,N); where C(n,r) is “n choose r”. You are given...
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Mr. Ant and His ProblemMr. Ant has 3 boxes and the infinite number of marbles. Now he wants to know the number of ways he c...
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Bad NeighborsIn the strange neighborhood of Nocu, a lot of people lives pretty happily, or so they think. Like mo...
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Meera and Solo ChocolatesMeera bought candies from the store. She is now going to distribute those among her N friends. She m...
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How Many Paths?You are at the top left corner[position (1,1)] of a **R X C ** grid. Your destination is bottom righ...
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Bad Neighbors 2As some of you already know, Nocu City has a history of having bad neighbors. These bad ones, take a...
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Subset of SequencesYou will be given a set of sequences. Each sequence is a list of numbers. Two sequences are K-simil...
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Secret MeetingThe world is terrified by Pandas! After a miraculous chemical explosion, they became smarter; and ev...
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Counting is Difficult 2East West University Computer Programming Club (EWUCoPC) is arranging an Intra-University Programmin...
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Trivial SummationThe problem statement is so small. Give you four integers r, a, b, d. Find the summation of all numb...
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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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XOR MasterImam has been participating in online programming contests for years. His goal is to become a “Maste...
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K-th DuoPalindromeAlice likes playing with Palindromes (strings that read the same backward as forward, such as ‘madam...
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Easy Peasy Subset SumLittle Oishee loves to watch TV. But her mother, who is a math teacher, doesn’t like this at all. Sh...
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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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String in a Grid 2Prof. Bari loves to play with string. He is also very skilled in drawing. One day he was drawing a g...
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Bad CookMr. Meme has recently moved to a foreign country named “Gloryland” for study purpose. There, he has ...
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Irregular Is Tough, Regular Is Easy!Dr. Bari is working on some chemical formation. He believes that chemicals and shapes that are regul...
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Hange and Her GearHange has developed a special gear to attack the Cart Titan. The gear is a round, disc-like object. ...
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Cook a DishHave you ever cooked something? No? Not a problem! Whenever you try to cook something, you need som...
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Interplanetary MissionThe National Space Center(NSC) is planning an interplanetary mission in a new galaxy far far away fr...
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