Hardest Problem EverProf.Dr.DP is very famous professor. He is expert (actually lege... 
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... 
BuildingsThere are n buildings in a row. The height of the i’th building ...

Road Minister TechboyTechboy is appointed as the minister of roads and highway in his... 
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...

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. ... 
Problem Setter CrisisCompetitive Programming is very popular in Leading University. T... 
Fantastic FoodAs we all know that Alice and Bob just landed in Fantastic World...
