Cash Change
You have an unlimited number of cash notes of the following denominations: 1, 5, 10, 50, 100, 500. G...
Subset AND
You are given an array A of n integers and an integer k. You need to find if there is any non-empty ...
Burger King
Every day, more than 11 million guests visit BURGER KING® restaurants around the world. And they do ...
Passwords
Alice wants to extract some passwords from a random string. A password can have any number of charac...
Penguins of Madagascar
One day the penguins of Madagascar found a string S... Wait... Wait. Actually the setter of the prob...
Find the Good Sequence
Let's say two numbers are called "good" if their difference is at least 2. Similarly, a sequence is ...
Sgt. Laugh
That's it. Sgt. Laugh has had enough. He is determined to end the evil military reign of General Cry...
Rainy Day
You have to complete N tasks tomorrow, where each task can last for any number of minutes. Each task...
Birthday Present?!
As everyone gifts graphs or strings to people on their birthdays, Oyshee’s friends decided to do som...
A Journey Towards One
Given N. You can perform 3 types of operations: Increase N by 1. Decrease N by 1. Divide N by 2, av...
Game of Tic-Tac-Toe
Alice and Bob is a playing a game of tic-tac-toe, to be precise a variant of tic-tac-toe called Nota...
Gaaner Koli
The protagonists of this problem are two great programmers of a certain institution Omanush and Ordi...
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...
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...
Subarray Sum
You are given an array having N integers. You have to select at most K positions in the array and re...
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...
LIDS
We all know about LIS (Longest Increasing Sub sequence). The task to find the length of the longest ...
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...
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)×F(X+1)+2 Here X is a posit...
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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