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

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

Train HijackYou and your friend Daneliya Tuleshova are planning to hijack a train. Your friend will go inside a...

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

Easy Sequence 2Let’s define a easy sequence F. Where F(1) = 1 F(2X) = F(X)^2 + 1 F(2X+1) = F(X) \times F(X+1) + 2 H...

Convert String Into PalindromeA palindrome is a word, number, phrase, or other sequence of characters which reads the same backwar...

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

Fivefold RemovalsAlice and Bob are playing a simple game on marbles. They have a bucket containing N marbles, and the...

Polygon Construction (Hard)Meera in going to picnic with her friends. They are going to have lots of fun. They will be doing va...

No GCDYou are given N integers. Each integer is square free (i.e. it has no divisor which is a square numb...

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

Easy Sequence 1Let’s define an easy sequence F. Where F(1) = 1 F(2X) = F(X)^2 + 1 F(2X+1) = F(X) \times F(X+1) + 2 ...

The Game of RocksAlice and Bob have come up with a new game. Bob gives Alice a NxM grid that contains N rows and M co...

Gaaner KoliThe protagonists of this problem are two great programmers of a certain institution Omanush and Ordi...

The Perfect CollectionGiven an array A of N integers, if we choose any K of these integers and calculate their bitwise XOR...

Sticking PinsYou are sticking pins on a 2D board at N given coordinates. However, since you are not very good at ...

Smart Feature Phone 2Alice worked in CIA. Right now he need to send an encrypted message to the headquarter(HQ) of CIA. ...

Perseus and The New ChallengeThe life of princess Andromeda, the daughter of King Cepheus and Queen Cassiopeia of Ados, is in dan...

Dominoes ForeverOnce when I was little, my father took me to a tobacco shop! It is surprising, but true. He asked th...

Pathetic Interview IIYou all know about the story of Pathetic InterviewI. Today, I am sharing a story of my close friend...
