Christmas Tree
Professor Rio has an amazing Christmas tree. Unlike other trees, this Christmas tree has some specia...
Easy Prime!
There are N numbers in an array. You will have Q queries. In each query, you can make 2 operations. ...
Is It A Square?
Shikamaru is the most brilliant student of his class. He is very good at Mathematics. Mr. Asuma is t...
Left Prime
Prime numbers are the ones which can only be divided by 1 and the number itself. 2, 3, 5, 7, 11, 13 ...
Chowdhury Saheb & the Numbers
You like short description of problems? Me too! Let's go to an easy problem. You are given an array ...
Love Letters!
Lately Fahim is getting a lot of love letters. A LOT of love letters. Since he is confused about whi...
I Did Not Do the Assignment
Professor Petr is very angry over some of his students now-a-days for not doing assignment. He wants...
Zacob the Batsman
It's known that Zacob is a reliable batsman of LU CSE Cricket Team. Also as long as he is on the cre...
Laali Vs Bessie
One day Raju discovered USACO and from that day he would spend all his time solving problems. Laali ...
Meena O Dosto Sele
Dosto sele Dipu and his friends used to disturb Rita Apu everyday on her way to school singing , " র...
Trick or Trees
One day, Raju was out roaming in the woods,when he suddenly stumbled upon a large garden. There were...
Find the primes?
For a positive integer n, let’s define a function f: f(n) = sum of positive integers less than n whi...
Kitorp and His Love
Kitorp loves his wife Asiar(who is a problem solver as well) but he loves math more. To get his atte...
Prime Range
Prime Numbers are such numbers which are only divided by 1 and the number itself. 2, 3, 5, 7, 11, 13...
For Loop FTW
You are given an integer N which can be represnted as the product of two positive integers. $ N = a_...
Is It a Perfect Square?
Given some numbers, can you tell, if the product of these numbers are a perfect square or not? A num...
I Am Good 2.0
I am trying to become a good guy, giving contestants as little pain as possible. So, this problem is...
Kitchen Decorate
Shira has now decided to decorate her kitchen of height H and width W more precisely, she wants to t...
Easy Factorial?
It is time to show your performance on number theory. Why so late? Come to the point. You are given...
The Greedy Mathematician
Once upon a time, there lived a man called Mahi the mathematician. He was banned from his kingdom be...
Tom Is a Good Mentor
Today is the first day of the little mouse Jerry at school. Famous mathematician Tom is his teacher....
Crypto-Number
Walt and Gus have a great rivalry. Recently Gus has developed a cryptographic system. Walt is trying...
Lucky Shirt
Marjokes is a very famous comedy personality in Byteland. He is a poet, a writer, a singer and an ac...
Quarantine!!!
China is one of the strongest countries in the world in the sense of economy and military technology...
The Easiest Problem
Tareq Abrar is a lazy programmer. He has a friend named Aminvai, who is famous for his amazing skill...
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