Rivalry Friends
Ryo and his girlfriend love to think about challenges. One day his girlfriend gave him a challenge t...
Is Bita Happy?
Bita has learned bitwise-operations recently. She is doing some experiments with these operations no...
Solve This Giveaway Problem First
This problem is straightforward and easy. You will be given two integers N, P and a list L of positi...
Beauty of AP
Solving problems is fun in competitive programming, right? So let’s solve a fun task today too :P. 1...
Perfect Points
Perfect lines are the lines y=mx+c such that m and c are positive integers. Perfect points are the p...
Composite Facts
Let's define two functions F and S: F(n) = 1 + n! S(n,m) = Sum of first m non-prime integers which ...
M-Sequence
A sequence is called M-sequence if after removing zero or more elements from the sequence the GCD of...
Mr Makor And His Friends
Mr Makor has a set S of n integers. He calls a sequence of length k special if every element of the ...
No Onion, No Cry
-Onions make us cry, don't they? They can make us happy too. -How? -Read the statement carefully! I...
K-Th Root
You will be given Q queries. In each query, you will be given two positive integers A and B. You hav...
Joker's GCD Test
Joker has a sequence P of n integers. Each two elements in the sequence are pairwise distinct. He de...
Welcome to Criterion Rounds
The team congratulates you for participating in this contest and for being part of the journey towar...
I Am Good
I am trying to become a good guy, because it doesn't take money to become good. So here's a short an...
Oishi Teacher and Her Naughty Class
Oishi teacher has returned to her class after the tiffin break. She noticed that some students who r...
Dividing the Gifts
Today is a very good day in CSEmpur because Tuktuki has bought N gifts! Tuktuki wants to give these ...
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