CREATIVE PROBLEM 1. 4.14 Develop a brute-force algorithm to the 4-sum problem.

Use the ThreeSum fro the text as a model

http://algs4.cs.princeton.edu/14analysis/ThreeSum.java.html /*************************************************************************

  * Compilation: javac FourSum.java   

  * Execution: java FourSum < input.txt   

  *   

  * A program with N^4 running time. Read in N long integers   

  * and counts the number of 4-tuples that sum to exactly 0.   

  *   

  * Limitations   

  * -----------   

  * - we ignore integer overflow   

  *  *************************************************************************/