Hardest Problem Ever

Prof.Dr.DP is very famous professor. He is expert (actually lege...

Diagonal Sum

Given an N*N size matrix, you have to re-arrange the elements of...

Game of Strings

Redoan is very fond of strings. He wants to go on a spree of sol...

Passwords

Alice wants to extract some passwords from a random string. A pa...

Buildings

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

Road Minister Techboy

Techboy is appointed as the minister of roads and highway in his...

Déjà Vu

Thor, the Thunder God is fighting a horde of monsters in a ca...

Flow on Tree

Mr. Kaboom has recently learned about maximum flow. Now his frie...

Flyover in Twinland

Rio 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 Crisis

Competitive Programming is very popular in Leading University. T...

Fantastic Food

As we all know that Alice and Bob just landed in Fantastic World...