#!/usr/bin/python3 from timeit import default_timer def main(): start = default_timer() fib1 = 1 fib2 = 1 fibn = fib1 + fib2 i = 3 while len(str(fibn)) < 1000: fib1 = fib2 fib2 = fibn fibn = fib1 + fib2 i = i + 1 end = default_timer() print('Project Euler, Problem 25') print('Answer: {}'.format(i)) print('Elapsed time: {:.9f} seconds'.format(end - start)) if __name__ == '__main__': main()