For Loop FTW
You are given an integer N which can be represnted as the product of two positive integers. $ N = a_...
N-th Prime
In this problem, you will have to print the $n$-th prime number. The first few prime numbers are giv...
Life of Phi
The Great Khami is learning Number Theory. He is very excited to know that Euler's Totient Function ...
Prime Factors
Given an integer N, can you determine its prime factors?
Hidden Graph
There is an unweighted, undirected hidden graph. You are given an integer range from L to R. There a...
GCD Plus LCM
In this problem you will be given two integers a, b. You have to answer if GCD(a,b)+LCM(a,b)=a+b is ...
Rivalry Friends
Ryo and his girlfriend love to think about challenges. One day his girlfriend gave him a challenge t...
Ishtiaque and the Rabbit
Mr Ishtiaque is in trouble. A few months ago, he bought 2 rabbits. He wanted to have two pet rabbits...
K-Th Root
You will be given Q queries. In each query, you will be given two positive integers A and B. You hav...
Switches
Technology is going ahead very fast. How can we know what will we get in future? One day you met a g...
A Lack of Common Divisors
Given a positive integer N, determine how many of the integers between 1 and N are co-prime with N. ...
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...
Sum of GCD and LCM
The greatest common divisor (GCD) of two integers, is the largest integer that divides both of the i...
Magic Number
Jack loves to play with numbers. One day, while he was playing with numbers he found something inter...
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...
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...
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...
Equation Equals Hazards
You are given the equation, GCD(A,M) = 1. You have to determine whether there exists at least one in...
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...
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...
Largest Prime
A positive integer number n is called a prime number, if it is only divisible by 1 and n itself, whe...
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