A sample data file can be found at ~cs110/public_html/hw1/hw1-data. This is not the file you will use for the contest, but it is in the correct format and will allow you to test your program.
There are two new classes for your use. Random is a good random number generator for use in Homework 1 (and probably later assignments). CPUTimer is a class for making CPU timing easy. See the headers for explanations of their use. The files, along with an example main program, can be found in the directory here