N-th Prime
In this problem, you will have to print the n-th prime number. The first few prime numbers are given...
Modulo
Let's get straight into the problem. In ths problem, here will be multiple test cases. In each test ...
Prime Factors
Given an integer N, can you determine its prime factors?
Rivalry Friends
Ryo and his girlfriend love to think about challenges. One day his girlfriend gave him a challenge t...
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...
Do you have Arithmophobia ?
Don’t worry! If you are a programmer, you might not have arithmophobia!! But Era has a weird phobia ...
Relatively Prime
Given a positive integer N, determine how many of the integers between 1 and N are co-prime with N. ...
Shine on You Crazy Diamond
This problem is authored by one of our late friends, Sifat, who unexpectedly left us last year. He w...
Ishtiaque and the Rabbit
Mr Ishtiaque is in trouble. A few months ago, he bought 2 rabbits. He wanted to have two pet rabbits...
Find the primes?
For a positive integer n, let’s define a function f: f(n) = sum of positive integers less than n whi...
Chowdhury Saheb & the Numbers
You like short description of problems? Me too! Let's go to an easy problem. You are given an array ...
Left Prime
Prime numbers are the ones which can only be divided by 1 and the number itself. 2, 3, 5, 7, 11, 13 ...
Secret Meeting
The world is terrified by Pandas! After a miraculous chemical explosion, they became smarter; and ev...
Equation Equals Hazards
You are given the equation, GCD(A,M)=1. You have to determine whether there exists at least one inte...
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 ) + 12...
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...
Largest Prime
A positive integer number n is called a prime number, if it is only divisible by 1 and n itself, whe...
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...
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 ...
Fast Co-Prime
Two numbers A and B are called co-prime if the only common positive factor of the two numbers is 1. ...
Correct the Sieve
Sieve of Eratosthenes is a fast algorithm for finding prime numbers in larger ranges. According to W...
Trick or Trees
One day, Raju was out roaming in the woods,when he suddenly stumbled upon a large garden. There were...
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...
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