LIDS
We all know about LIS (Longest Increasing Sub sequence). The task to find the length of the longest ...
Penguins of Madagascar
One day the penguins of Madagascar found a string S... Wait... Wait. Actually the setter of the prob...
Divisible by 3
You will be given a string containing digits. You have to say the number of sub strings whose sum is...
m-Beautiful Numbers
An m-Beautiful Number is a number which is divisible by $m$ and the sum of the digits is also divisi...
Burger King
Every day, more than 11 million guests visit BURGER KING® restaurants around the world. And they do ...
Game of Palindromes
In a popular computer game, Game of Palindromes also known as GOP there is a city called Palindesh. ...
Snake's Neck
Remember Violet and Dash from the movie "The Incredibles"? The two siblings recently installed the c...
Third Dimension
Mr. J wants to learn about combinatorics. He started reading a book on combinatorics and came across...
Easy Sequence 1
Let’s define an easy sequence F. Where $ F(1) = 1 $ $ F(2X) = F(X)^2 + 1 $ $ F(2X+1) = F(X) \times F...
Messy Table
Akib is a very good student but his reading table is very messy. One Friday afternoon, Akib is sitti...
Train Hijack
You and your friend Daneliya Tuleshova are planning to hijack a train. Your friend will go inside a...
Convert String Into Palindrome
A palindrome is a word, number, phrase, or other sequence of characters which reads the same backwar...
Is This a Give-Away?
Once there lived an ancient mage named Farabi. He could always give perfect weather forecast. He nev...
Find NSUPS
Given a string s, find the number of subsequence in s which forms the word "NSUPS". A subsequence is...
Harry Potter and the Vault of Gringotts
"There was a break-in of Gringotts Wizarding Bank on 1 May, 1998, during the height of the Second Wi...
Gaaner Koli
The protagonists of this problem are two great programmers of a certain institution Omanush and Ordi...
Alice in Candyland
Alice came up with a new game. In this game called "Candy Quest", there is a NxN size 2D grid. In ea...
OCD Returns!
This problem author has OCD (obsessive–compulsive disorder). One day his teacher gave him an array o...
The Perfect Collection
Given an array A of N integers, if we choose any K of these integers and calculate their bitwise XOR...
Subarray Sum
You are given an array having N integers. You have to select at most K positions in the array and re...
Maximum Sum
Little Jimmy loves to play with numbers. One day he was playing with a number sequence. In his game,...
Sticking Pins
You are sticking pins on a 2D board at N given coordinates. However, since you are not very good at ...
Very Dirty String
Strings are difficult, most of the contest programmers say this and try to avoid string algorithms. ...
Orchid Division
Quido has a square orchard full of various fruit and nut trees. The trees are planted in regular row...
Smart Feature Phone 2
Alice worked in CIA. Right now he need to send an encrypted message to the headquarter(HQ) of CIA. ...
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