Do You Know Tree ?
"Stay at least one metre distance from others.” Corona has affected the World as well as Bangladesh....
Maximum Sum
Little Jimmy loves to play with numbers. One day he was playing with a number sequence. In his game,...
Alternative Subsequence: The Extension
Recall that the sequence b is a subsequence of the sequence a, if b can be derived from a by removin...
Super Mario Bros
Every kid loves to play Super Mario Bros. Mario moveু forward and collects coins in a stage. Stages ...
Make It Big!
You are given a number N (10 ≤ N ≤ 2×109). You have to perform exactly two swap operation. You can c...
Sticking Pins
You are sticking pins on a 2D board at N given coordinates. However, since you are not very good at ...
Shopping is Fun!!
Mr. Hikiko passed his Eid without shopping because of ongoing lockdown. Now, Govt. removed the lockd...
Penguins of Madagaskar
You all heard about the Penguins of Madagaskar. They work for the penguin kind and loves cuteness. O...
Video Game Pro
Shefin is playing a video game. In this game, there will be $N$ buildings in a row. $i^{th}$ buildin...
Orchid Division
Quido has a square orchard full of various fruit and nut trees. The trees are planted in regular row...
Messy Table
Akib is a very good student but his reading table is very messy. One Friday afternoon, Akib is sitti...
Find NSUPS
Given a string s, find the number of subsequence in s which forms the word "NSUPS". A subsequence is...
m-Beautiful Numbers
An m-Beautiful Number is a number which is divisible by $m$ and the sum of the digits is also divisi...
Defeat in Final Battle
Sifatul Islam is a great fan of Iron man. He is planning to make a suit for iron man. The suit can s...
Third Dimension
Mr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...
Buckets of Water
In Abby's area the water is available in the tap only from 6AM to 8AM. So, Abby thought she would st...
Ekupai
Hacker robot Ekupai is trying to hack a supercomputer. He needs a cheat code X to hack this computer...
Fivefold Removals
Alice and Bob are playing a simple game on marbles. They have a bucket containing N marbles, and the...
Happiness
If you have a Tk 100 in your wallet, what would you do? You might have couple of ways to spend that ...
My Small Number
You are given two integers N and M. Find another integer X divisible by M that has the same number o...
Polygon Construction (Hard)
Meera in going to picnic with her friends. They are going to have lots of fun. They will be doing va...
No GCD
You are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb...
The Game of Rocks
Alice and Bob have come up with a new game. Bob gives Alice a NxM grid that contains N rows and M co...
Chocolate
There is a shop named Chocolove in the Codeland. There are many chocolates in the shop. Each chocola...
Is It Perfect
Bob has an initial array D of length n . Alice is a good friend of Bob. So Bob challenges Alice to f...
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