hacktoberfest-2018/code/sadikkuzu.py

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2018-10-07 13:13:37 +00:00
## https://gist.github.com/sadikkuzu/af6a69d73f463b1b6b30aec15935dbc9
# https://www.wikiwand.com/en/Happy_number
# http://mathworld.wolfram.com/HappyNumber.html
def square(x):
return int(x) * int(x)
def happy(number):
return sum(map(square, list(str(number))))
def is_happy(number):
seen_numbers = set()
while number > 1 and (number not in seen_numbers):
seen_numbers.add(number)
number = happy(number)
return number == 1
def is_happy2(n): # recursive
return (n == 1 or n > 4 and is_happy2(happy(n)))