def main():
i = 4500
while True:
if fib_matrix(i) < 10 ** 999:
#print "i:", i, fib2(i)
#print i
i += 1
else:
break
print i
def main():
end = 4000000
sum_fib = 0
i = 0
while True:
fib = fib_matrix(i)
if fib < end:
#print "i:", i, fib
if fib % 2 == 0:
sum_fib += fib
i += 1
else:
break
print sum_fib
