Super Shop

A super shop sells only 26 items, labeled them from ‘A’ to ‘Z’. ...

No GCD

You are given N integers. Each integer is square free (i.e. it h...

Gaaner Koli

The protagonists of this problem are two great programmers of a ...

Harry Potter and the Vault of Gringotts

“There was a break-in of Gringotts Wizarding Bank on 1 May, 1998...

Alice in Candyland

Alice came up with a new game. In this game called “Candy Quest”...

Subset Multiplication

In mathematics, especially in set theory, set A is a subset of s...