#
# 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
#
# 
# @param n int整型 
# @return bool布尔型
#
class Solution:
    def happynum(self , n: int) -> bool:
        # write code here
        seen = set()
        while n != 1 and n not in seen:
            seen.add(n)
            total = 0
            while n > 0:
                digit = n % 10
                total += digit * digit
                n //= 10
            n = total
        return n == 1