New Year Couple
The new year 2017 is here. To celebrate the 31st night, Mr Rio has thrown a big party at his house. ...
Undo History
Robin is using a peculiar text editor to write a sequence of lines of text. The editor consists of t...
The Punishment of Hasinur
Hasinur studies at X School & College situated in Chittagong. AA Sir is one of the toughest and ...
MaxXOR
You are given an array AAA of n integers (A1A_1A1​, A2A_2A2​, ..., AnA_nAn​) and some queries. In ea...
Yet Another XOR Problem
Given a rooted tree with N nodes where each node has a value, find a pair of nodes (u, v) so that u ...
Another String Query Problem
This time I'm going to introduce you to a new land, called String Land. In String Land there are N ...
Yet another Real Life Problem
Akash is one of the finest programmers of AUST. His closest senior Shuvro asked him if he can solve ...
Spam Me Not
Your team has been tasked to build a section of a web app where users can choose whether and how the...
Fabby and Her Wedding Dress
You all remember Fabby, the princess of Byteland. People of Byteland are waiting for the biggest cel...
Yet Another XOR Tree Problem
You are given a tree with NNN nodes. A non-negative weight is assigned to each edge of the tree. Let...
Subtree MEX
You will be given a balanced binary tree of NNN nodes. Each of the nodes of the tree will contain a ...
XOR Is Fun
Efa hates numbers. But she loves the XOR operation. This time, you have to solve another problem for...
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