1134. Armstrong Number

The k-digit number N is an Armstrong number if and only if the k-th power of each digit sums to N.

Given a positive integer N , return true if and only if it is an Armstrong number.

 

Example 1:

Input: 

153

Output: 

true

Explanation: 

153 is a 3-digit number, and 153 = 1^3 + 5^3 + 3^3.

Example 2:

Input: 

123

Output: 

false

Explanation: 

123 is a 3-digit number, and 123 != 1^3 + 2^3 + 3^3 = 36.

 

Note:

1. 1 <= N <= 10^8