Memes vs. Social MediaIn this era of modern technology social media is the most powerf...

Poltu and Interesting NumberPoltu Loves interesting number. So he wants to find this type of...

Hardest Problem EverProf.Dr.DP is very famous professor. He is expert (actually lege... 
Burger KingEvery day, more than 11 million guests visit BURGER KING® restau...

Diagonal SumGiven an N*N size matrix, you have to rearrange the elements of...

Game of StringsRedoan is very fond of strings. He wants to go on a spree of sol... 
PasswordsAlice wants to extract some passwords from a random string. A pa... 
Convert String Into PalindromeA palindrome is a word, number, phrase, or other sequence of cha... 
BuildingsThere are n buildings in a row. The height of the i’th building ...

Messy TableAkib is a very good student but his reading table is very messy....

Snake's NeckRemember Violet and Dash from the movie “The Incredibles”? The t...

Road Minister TechboyTechboy is appointed as the minister of roads and highway in his... 
My Small NumberYou are given two integers N and M. Find another integer X divis... 
Very Dirty StringStrings are difficult, most of the contest programmers say this ... 
Déjà VuThor, the Thunder God is fighting a horde of monsters in a ca...

Flow on TreeMr. Kaboom has recently learned about maximum flow. Now his frie...

Polygon Construction (Hard)Meera in going to picnic with her friends. They are going to hav...

Third DimensionMr. J wants to learn about combinatorics. He started reading a b...

No GCDYou are given N integers. Each integer is square free (i.e. it h... 
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Easy Sequence 2Let’s define a easy sequence F. Where $ F(1) = 1 $ $ F(2X) = F...

The Game of RocksAlice and Bob have come up with a new game. Bob gives Alice a N...

Gaaner KoliThe protagonists of this problem are two great programmers of a ...

Flyover in TwinlandRio has become the president of Twinland. Now he wants to develo...

The Perfect CollectionGiven an array A of N integers, if we choose any K of these inte... 
Darth Vader and 3PO on a Tree!Did you watch Star Wars yet? No? You should in your free time. ... 
Sticking PinsYou are sticking pins on a 2D board at N given coordinates. Howe...

Smart Feature Phone 2Alice worked in CIA. Right now he need to send an encrypted me...

Perseus and The New ChallengeThe life of princess Andromeda, the daughter of King Cepheus and...

Dominoes ForeverOnce when I was little, my father took me to a tobacco shop! It ...

Pathetic Interview IIYou all know about the story of Pathetic InterviewI. Today, I a... 
Dynamic Programming

Greedy Algorithm

Matrix Exponentiation
