Challenge From Mr. Professor

One Day Mr. Professor was taking His schedule class on Discrete Mathematics. In this lecture, He was...

Geometry Forever

Fear no more, this is a problem of geometry! When Moyna was little, he had a math teacher named Shuk...

Perplexity of Permutations

A permutation of N integers from 1 to N is an array where each number has appeared exactly once in t...

Trivial Summation

The problem statement is so small. Give you four integers r, a, b, d. Find the summation of all numb...

Color The Graph

You are given an acyclic, bidirectional graph with N nodes and M edges. The nodes are numbered from ...

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 ...

Bad Cook

Mr. Meme has recently moved to a foreign country named “Gloryland” for study purpose. There, he has ...

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...

Irregular Is Tough, Regular Is Easy!

Dr. Bari is working on some chemical formation. He believes that chemicals and shapes that are regul...

Cook a Dish

Have you ever cooked something? No? Not a problem! Whenever you try to cook something, you need some...

XOR Master

Imam has been participating in online programming contests for years. His goal is to become a “Maste...

Counting is Difficult 2

East West University Computer Programming Club (EWUCoPC) is arranging an Intra-University Programmin...

String Factory

Welcome to the string factory where strings are generated in a peculiar manner. You are given a stri...

Obligatory IDPC Problem

There are n people busy with arranging the upcoming Inter Department Programming Contest (IDPC) 2016...

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”. You are given ...

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...

String Play

Milo has a string S of length L. Tutu picks a random prefix and Mota picks a random suffix of S. Now...

Bad Neighbors

In the strange neighborhood of Nocu, a lot of people lives pretty happily, or so they think. Like mo...