Easy Prime!

There are N numbers in an array. You will have Q queries. In each query, you can make 2 operations. ...

N'th Prime

In this problem, you will have to print the nth prime number. The first few prime numbers are given ...

Correct the Sieve

Sieve of Eratosthenes is a fast algorithm for finding prime numbers in larger ranges. According to W...

Rivalry Friends

Ryo and his girlfriend love to think about challenges. One day his girlfriend gave him a challenge t...

Largest Prime

A positive integer number n is called a prime number, if it is only divisible by 1 and n itself, whe...

Phi Numbers in Range!

In number theory, Euler’s phi function, denoted as ϕ(n), is an arithmetic function which counts the ...

Left Prime

Prime numbers are the ones which can only be divided by 1 and the number itself. 2, 3, 5, 7, 11, 13 ...

Birthday Gift for SJ

Today is your best friend SJ’s birthday. You want to buy a birthday present for her. You want to buy...

Sofdor Ali and the Puzzle of Weights

Sofdor Ali is one of the most famous scientists of Bangladesh. He is also well known for his puzzle ...

Magic Number

Jack loves to play with numbers. One day, while he was playing with numbers he found something inter...

Life of Phi

The Great Khami is learning Number Theory. He is very excited to know that Euler’s Totient Function ...

Ishtiaque and the Rabbit

Mr Ishtiaque is in trouble. A few months ago, he bought 2 rabbits. He wanted to have two pet rabbits...

Is Bita Happy?

Bita has learned bitwise-operations recently. She is doing some experiments with these operations no...

K-Th Root

You will be given Q queries. In each query, you will be given two positive integers A and B. You hav...

Magician's Offer!

Rosi Vidmun is a greedy landlord who likes to grab as much land as he can. Currently he has P square...

Equation Equals Hazards

You are given the equation, GCD(A,M) = 1. You have to determine whether there exists at least one in...

Fast Co-Prime

Two numbers A and B are called co-prime if the only common positive factor of the two numbers is 1. ...

Meera and Solo Chocolates

Meera bought candies from the store. She is now going to distribute those among her N friends. She m...

Co-Prime Enemy Pair

Two integers A and B are known as co-prime or relatively prime if their greatest common divisor GCD ...

Secret Meeting

The world is terrified by Pandas! After a miraculous chemical explosion, they became smarter; and ev...

Oh Functions

Let’s define functions f and g as: f(x) = 2 * ( f(x-1) + g(x-1) - 1 ) * ( f(x-1) + g(x-1) - 3 ) + 1...

The Game Is Back On

Moriarty is bored again. When he gets bored, the only thing he wants to do is play with Sherlock. So...

Christmas Tree

Professor Rio has an amazing Christmas tree. Unlike other trees, this Christmas tree has some specia...

Is It A Square?

Shikamaru is the most brilliant student of his class. He is very good at Mathematics. Mr. Asuma i...

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...

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 , “ ...

Trick or Trees

One day, Raju was out roaming in the woods,when he suddenly stumbled upon a large garden. There were...

Prime Range

Prime Numbers are such numbers which are only divided by 1 and the number itself. 2, 3, 5, 7, 11, 13...

Is It a Perfect Square?

Given some numbers, can you tell, if the product of these numbers are a perfect square or not? A nu...