Interview programming challenge 4#

This current post give the solution for a problem given in the following URL,

http://www.dev102.com/2008/05/19/a-programming-job-interview-challenge-4/

How would you implement the following method: Foo(7) = 17 and Foo(17) = 7. Any other input to that method is not defined so you can return anything you want. Just follow those rules:

• Conditional statements (if, switch, …) are not allowed.
• Usage of containers (hash tables, arrays, …) are not allowed.

The solution for this question would be as following, the following code is written in java

public int Foo(int x){
return 22^x;
}