BuildingsThere are n buildings in a row. The height of the i’th building ...

PasswordsAlice wants to extract some passwords from a random string. A pa... 
Diagonal SumGiven an N*N size matrix, you have to rearrange the elements of...

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

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

Darth Vader and 3PO on a Tree!Did you watch Star Wars yet? No? You should in your free time. ... 
Road Minister TechboyTechboy is appointed as the minister of roads and highway in his... 
Game of StringsRedoan is very fond of strings. He wants to go on a spree of sol... 
Problem Setter CrisisCompetitive Programming is very popular in Leading University. T... 
Dynamic Programming

Matrix Exponentiation
