JOSH :Diameter of a Binary Tree

Question: WAP that find out longest Diameter of Tree. The diameter of a tree (sometimes called the width) is the number of nodes on the longest path between two leaves in the tree.

Vinsol : Defected Meter

Question :A Defected meter is given with missing number 4 from it's rim.WAP that convert the wrong  reading into right one.

Example:

input 100

output 81

Google code jam :Alien Language

Question:

After years of study, scientists at Google Labs have discovered an alien language transmitted from a faraway planet. The alien language is very unique in that every word consists of exactly L lowercase letters. Also, there are exactly D words in this language.