31 lines
515 B
Python
31 lines
515 B
Python
#!/usr/bin/python3
|
|
|
|
from timeit import default_timer
|
|
|
|
def main():
|
|
|
|
start = default_timer()
|
|
|
|
fib1 = 1
|
|
fib2 = 2
|
|
fibn = fib1 + fib2
|
|
sum_ = 2
|
|
|
|
while fibn < 4000000:
|
|
if fibn % 2 == 0:
|
|
sum_ = sum_ + fibn
|
|
|
|
fib1 = fib2
|
|
fib2 = fibn
|
|
fibn = fib1 + fib2
|
|
|
|
end = default_timer()
|
|
|
|
print('Project Euler, Problem 2')
|
|
print('Answer: {}'.format(sum_))
|
|
|
|
print('Elapsed time: {:.9f} seconds'.format(end - start))
|
|
|
|
if __name__ == '__main__':
|
|
main()
|