Irregular Is Tough, Regular Is Easy!
Dr. Bari is working on some chemical formation. He believes that chemicals and shapes that are regul...
Geometry Forever
Fear no more, this is a problem of geometry! When Moyna was little, he had a math teacher named Shuk...
Level Up
You are playing a game that has 16 levels. You start with level 1 and after gaining a certain amount...
Arko and Special Permutations
Arko is very fond of permutations. He can easily calculate the number of nnn length permutations. (I...
Trivial Summation
The problem statement is so small. Give you four integers r, a, b, d. Find the summation of all numb...
Cook a Dish
Have you ever cooked something? No? Not a problem! Whenever you try to cook something, you need some...
K-th DuoPalindrome
Alice likes playing with Palindromes (strings that read the same backward as forward, such as 'madam...
Bad Neighbors 2
As some of you already know, Nocu City has a history of having bad neighbors. These bad ones, take a...
Counting Murgis
Ever since that wicked thief took away some of her murgis (hens, that is), Meena was ever anxious th...
Mina and Raju
Everyone know about Mina & Raju. They are siblings as well as good friend. The friend-circle of ...
Mr. Ant and His Problem
Mr. Ant has 3 boxes and the infinite number of marbles. Now he wants to know the number of ways he c...
Secret Meeting
The world is terrified by Pandas! After a miraculous chemical explosion, they became smarter; and ev...
Bad Cook
Mr. Meme has recently moved to a foreign country named "Gloryland" for study purpose. Ther...
How Many Paths?
You are at the top left corner [position (1,1)(1,1)(1,1)] of a R×CR \times CR×C grid. Your destinati...
Easy Peasy Subset Sum
Little Oishee loves to watch TV. But her mother, who is a math teacher, doesn't like this at all. Sh...
Compute the Combination
Let P = C(N,0) - C(N,1) + C(N,2) - C(N,3) + ... + C(N,N); where C(n,r) is "n choose r". Yo...
Subset of Sequences
You will be given a set of sequences. Each sequence is a list of numbers. Two sequences are K-simila...
String in a Grid 2
Prof. Bari loves to play with string. He is also very skilled in drawing. One day he was drawing a g...
Third Dimension
Mr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...
Meeting Place
There is an N*N grid where (r,c) denotes a cell number where r means row number, c means column numb...
Counting is Difficult 2
East West University Computer Programming Club (EWUCoPC) is arranging an Intra-University Programmin...
Kitchen Combinatorics
The world-renowned Swedish Chef is planning a gourmet three-course dinner for some muppets: a starte...
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 Seco...
Bad Neighbors
In the strange neighborhood of Nocu, a lot of people lives pretty happily, or so they think. Like mo...
String Play
Milo has a string S of length L. Tutu picks a random prefix and Mota picks a random suffix of S. Now...
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