An evil professor has just assigned you the following problem.
A sequence is defined by the following recurrence:
Input consists of a number of lines, each containing one integer, a value of i, no less than zero and no greater than one million. Input is followed by a single line containing the integer -1. This last line is not a value of i and should not be processed.
For each value of i in the input (but not the final -1), output the corresponding value of xi modulo 1000000.