BAPG

Russell loves solving math problems and also playing online games. Recently, he has started playing ...

Defeat in Final Battle

Sifatul Islam is a great fan of Iron man. He is planning to make a suit for iron man. The suit can s...

Ekupai

Hacker robot Ekupai is trying to hack a supercomputer. He needs a cheat code X to hack this computer...

Make It Big!

You are given a number N (10 ≤ N ≤ 2×109). You have to perform exactly two swap operation. You can c...

Binary Pigeons

There are N pigeons standing one after another in a straight line. There are two kinds of pigeons: w...

OCD Returns!

This problem author has OCD (obsessive–compulsive disorder). One day his teacher gave him an array o...

Convert String Into Palindrome

A palindrome is a word, number, phrase, or other sequence of characters which reads the same backwar...

Divisible by 3

You will be given a string containing digits. You have to say the number of sub strings whose sum is...

MSIS!

Do you know what MSIS is? MSIS is the abbreviation for Maximum Sum Increasing Subsequence. It is a s...

Diagonal Sum

Given an N*N size matrix, you have to re-arrange the elements of the matrix in such a way that the d...

Aliens

19 February 2020, Unidentified flying object (UFO) has captured student’s attention on top of the CS...

Who Ate the Pizza Slices?

Misty’s life is very dramatic. No matter how careful she is, some interesting and sometimes unfortun...

Counting Murgis

Ever since that wicked thief took away some of her murgis (hens, that is), Meena was ever anxious th...

Mina and Raju

Everyone know about Mina & Raju. They are siblings as well as good friend. The friend-circle of ...

Third Dimension

Mr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...

Permutations and Divisors

Let P be a permutation of length n where each value from 1 to n occurs exactly once. A subsequence o...

Burger King

Every day, more than 11 million guests visit BURGER KING® restaurants around the world. And they do ...

Distinct Permutations

You are given two binary strings A and B. Recall that binary string is a non-empty sequence of chara...

Shopping is Fun!!

Mr. Hikiko passed his Eid without shopping because of ongoing lockdown. Now, Govt. removed the lockd...

Passwords

Alice wants to extract some passwords from a random string. A password can have any number of charac...