Naming Convention
Tony works in a multinational technology company named Voogle LLC. The employees of Voogle follow ce...
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...
Interesting Parenthesis
Parentheses sequence of length 2n is the sequence containing exactly n opening parentheses «(» and e...
Oishi Teacher and Her Naughty Class
Oishi teacher has returned to her class after the tiffin break. She noticed that some students who r...
Is Bita Happy?
Bita has learned bitwise-operations recently. She is doing some experiments with these operations no...
Happy Sub-Sequence
Recently Alex has participated in a programming contest. He became 1st runner up. He couldn't solve ...
Snake's Neck
Remember Violet and Dash from the movie "The Incredibles"? The two siblings recently installed the c...
K-Game
To end the everlasting rivalry between Tom and Jerry, the Lady of the house found an Idea. She gives...
Is This a Give-Away?
Once there lived an ancient mage named Farabi. He could always give perfect weather forecast. He nev...
Lucky Stone Game
Alice and Bob are playing a stone game. They consider 4 and 7 as lucky numbers and they like to make...
m-Beautiful Numbers
An m-Beautiful Number is a number which is divisible by $m$ and the sum of the digits is also divisi...
Smart Feature Phone 2
Alice worked in CIA. Right now he need to send an encrypted message to the headquarter(HQ) of CIA. ...
Lets Play Pipeline
In this problem you will have to solve a puzzle game named "Pipeline". 90's kids knows this game ver...
COVID-19 Outbreak
COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...
Polygon Construction (Hard)
Meera in going to picnic with her friends. They are going to have lots of fun. They will be doing va...
Harry Potter and the Vault of Gringotts
"There was a break-in of Gringotts Wizarding Bank on 1 May, 1998, during the height of the Second Wi...
No GCD
You are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb...
Super Mario Bros
Every kid loves to play Super Mario Bros. Mario moveু forward and collects coins in a stage. Stages ...
Without Any Legend
You have two arrays $A_1, A_2, ..., A_N$ and $C_1, C_2, ..., C_N$ of length $N$. Initially for each ...
Holy Tree
What is a tree? A tree is a bidirectional connected graph with no cycle. In a tree, we can create ...
Very Dirty String
Strings are difficult, most of the contest programmers say this and try to avoid string algorithms. ...
MSIS!
Do you know what MSIS is? MSIS is the abbreviation for Maximum Sum Increasing Subsequence. It is a s...
My Small Number
You are given two integers N and M. Find another integer X divisible by M that has the same number o...
Third Dimension
Mr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...
Superman and the Buildings of Dahaka
To end the long-running feud between Superman and Goku fans regarding who's stronger, Zeron has deci...
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