ACT 1: Ash Counting Trees Ash Ketchum has a weird rooted tree (read Notes sections if you don't know about tree data structure... |
Admission Gift During admission exams in the city of RR (Royal Royal city), the students of RR University of Engine... |
A GRE Themed Contest Problem Sadman and Najkin were solving a GRE math problem, Rejbah another friend of theirs listened to that ... |
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. ... |
Arko and Special Permutations Arko is very fond of permutations. He can easily calculate the number of n length permutations. (In ... |
Arrange the Bricks! You have $N$ bricks two dimensional bricks of the dimension $1 \times 2$. The bricks are rotatable i... |
Beauty of AP Solving problems is fun in competitive programming, right? So let’s solve a fun task today too :P. 1... |
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... |
Birthday Surprise Adnan bhai, Priyom dada and Shuvo bhai are the members of MU_Kheloars. They recently got graduated a... |
Challenging Lover Greetings to all of you. You must have heard about our star programmer Rafat bhai. One day he went o... |
Choice Is Yours For not participating on contests regularly, Hasnaine (read Has9) has decided to kill Santo. But nob... |
Chowdhury Saheb & the Numbers You like short description of problems? Me too! Let's go to an easy problem. You are given an array ... |
Christmas Tree Professor Rio has an amazing Christmas tree. Unlike other trees, this Christmas tree has some specia... |
Complex Tashreef Tashreef finally received the Zuinness Journal of Galactic records recognition for being the most co... |
Composite Facts Let's define two functions F and S: F(n) = 1 + n! S(n,m) = Sum of first m non-prime integers which ... |
Co-Prime Enemy Pair Two integers A and B are known as co-prime or relatively prime if their greatest common divisor GCD ... |
Correct the Sieve Sieve of Eratosthenes is a fast algorithm for finding prime numbers in larger ranges. According to W... |
Crypto-Number Walt and Gus have a great rivalry. Recently Gus has developed a cryptographic system. Walt is trying... |
Day-Month-Year Meena is a talented girl in her class. She likes to brainstorm in her leisure times. One day, she wa... |
Distribution of Relief "Please follow all instructions provided by your local health authorities." Due to Coronovirus epide... |
Dividing the Gifts Today is a very good day in CSEmpur because Tuktuki has bought N gifts! Tuktuki wants to give these ... |
Divisible LCM You have a sequence a1, a2, a3, …, an of n integers and q queries. In each query, you are given ... |
Do you have Arithmophobia ? Don’t worry! If you are a programmer, you might not have arithmophobia!! But Era has a weird phobia ... |
Easy Factorial? It is time to show your performance on number theory. Why so late? Come to the point. You are given... |
Easy Prime! There are N numbers in an array. You will have Q queries. In each query, you can make 2 operations. ... |