def ifHappy(n):
if n==1:
print(True)
elif 1<n<10:
print(False)
else:
value = str(n)
num = 0
for i in range(len(value)):
num += int(value[i])**2
ifHappy(num)
N = eval(input())
ifHappy(N)
原文：https://www.cnblogs.com/shizihao/p/15267363.html