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 inte...
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 ) + 12...
Largest Prime
A positive integer number n is called a prime number, if it is only divisible by 1 and n itself, whe...
Correct the Sieve
Sieve of Eratosthenes is a fast algorithm for finding prime numbers in larger ranges. According to W...
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...
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_...
Toph uses cookies. By continuing you agree to our Cookie Policy.