202. Happy Number Leetcode Python
Write an algorithm to determine if a number is "happy".
A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers.
Example: 19 is a happy number
12 + 92 = 82
82 + 22 = 68
62 + 82 = 100
12 + 02 + 02 = 1
Credits: Special thanks to @mithmatt and @ts for adding this problem and creating all test cases.
This algorithm need to validate its digits.
A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the number equals 1 (where it will stay), or it loops endlessly in a cycle which does not include 1. Those numbers for which this process ends in 1 are happy numbers.
Example: 19 is a happy number
12 + 92 = 82
82 + 22 = 68
62 + 82 = 100
12 + 02 + 02 = 1
Credits: Special thanks to @mithmatt and @ts for adding this problem and creating all test cases.
This algorithm need to validate its digits.
class Solution:
# @param {integer} n
# @return {boolean}
def isHappy(self, n):
val = set()
while n not in val:
val.add(n)
newn = 0
while n != 0:
newn += (n % 10) * (n % 10)
n /= 10
n = newn
if n == 1:
return True
return False