UVa 10591 - Happy Number

Problem Number - Problem Name

 * [Problem Link]

Summary
Summary of the problem statement goes here.

Explanation
Explanation of the ideas behind the solution goes here.

Gotchas

 * Any points one can easily overlook?
 * The correct way to understand ambiguous formulations?

Implementations
Notes/Hints on actual implementation here.

Optimizations
Optimizations here.

Input
Input Here

Output
Output Here