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 ...
Super Mario Bros
Every kid loves to play Super Mario Bros. Mario moveু forward and collects coins in a stage. Stages ...
XOR Is Fun
Efa hates numbers. But she loves the XOR operation. This time, you have to solve another problem for...
No GCD
You are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb...
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...
Polygon Construction (Hard)
Meera in going to picnic with her friends. They are going to have lots of fun. They will be doing va...
COVID-19 Outbreak
COVID-19 outbreak in Atlantis is so bad that the government is forced to lock down the whole country...
Smart Feature Phone 2
Alice worked in CIA. Right now he need to send an encrypted message to the headquarter(HQ) of CIA. ...
m-Beautiful Numbers
An m-Beautiful Number is a number which is divisible by $m$ and the sum of the digits is also divisi...
Lets Play Pipeline
In this problem you will have to solve a puzzle game named "Pipeline". 90's kids knows this game ver...
Lexicographical Smallest String
There is a string $s$ of length $n$ containing lowercase letters and an integer $k$. Among the lette...
Lucky Stone Game
Alice and Bob are playing a stone game. They consider 4 and 7 as lucky numbers and they like to make...
Generation Gap
There are n people standing in a queue. The age of the ith person is ai. The more the age gap betwee...
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...
Snake's Neck
Remember Violet and Dash from the movie "The Incredibles"? The two siblings recently installed the c...
Happy Sub-Sequence
Recently Alex has participated in a programming contest. He became 1st runner up. He couldn't solve ...
Is Bita Happy?
Bita has learned bitwise-operations recently. She is doing some experiments with these operations no...
Oishi Teacher and Her Naughty Class
Oishi teacher has returned to her class after the tiffin break. She noticed that some students who r...
Interesting Parenthesis
Parentheses sequence of length 2n is the sequence containing exactly n opening parentheses «(» and e...
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...
Permutations and Divisors
Let P be a permutation of length n where each value from 1 to n occurs exactly once. A subsequence o...
Naming Convention
Tony works in a multinational technology company named Voogle LLC. The employees of Voogle follow ce...
Master Plan
Gakra Miah is a Wollywood movie lover. He watches movies almost everyday. He has watched so many mov...
Keep It Cool
As the workload of the semester is ramping up you get the task of refilling the fridge in the lab wi...
Greedy Moderate 33/37/89
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