Groby

In the 1970-80s, students in the Soviet Union had to face quite a hurdle. The administrators of sele...

Revisiting Metro Rail Blocks

The city of Dhaka is experiencing the construction of metro rails. Imagine one such metro rail spans...

Help Sakib!

Sakib likes competitive programming. Often he takes part in online programming contests. But due to ...

Binary Pigeons

There are N pigeons standing one after another in a straight line. There are two kinds of pigeons: w...

ACT 1: Ash Counting Trees

Ash Ketchum has a weird rooted tree (read Notes sections if you don’t know about tree data structure...

Next Permutation

A sequence of N distinct integers is called a permutation if all the integers are between 1 and N (i...

Hououin Kyouma!

Okabe Rintarou, the mad scientist is doing research to find the most desired Steins Gate. Besides be...

Tricky Racer

Talent Bob is a galaxy wide known legend and a racer (in game :P). He always wins races by his trick...

The Game Is Finally On

As Mr. Bean was playing a video game in the previous problem, now he is leveled up. At this level, h...

Who Gets the Money!?

Who doesn’t get happy after getting money in the pockets of clothes before washing them? During this...

Chance of Passing the Quiz

Rocky is starting his online quizzes and he has been provided with some passing criteria. The rule o...