projecteuler/92.py

#!/usr/bin/env python
from utils import digits

def quad(n):
    return n * n

def end(s):
    return s if s == 1 or s == 89 else end(sum(map(quad, digits(s))))

count = 0

for n in xrange(1, 10000000):
    if end(n) == 89:
        count += 1

print count