LintCode:快乐数

Python代码

class Solution:    # @param {int} n an integer    # @return {boolean} true if this is a happy number or false    n_list = []    def isHappy(self, n):        # Write your code here        if n==1:            return True        elif n in self.n_list:            return False        else:            self.n_list.append(n)            n1 = 0            for i in str(n):                n1 += int(i)*int(i)            return self.isHappy(n1)