power-function

Link to Problem Statement : https://www.interviewbit.com/problems/implement-power-function/

or

Problem Statement :-

Implement pow(x, n) % d.

In other words, given x, n and d,

find (xn % d)

Note that remainders on division cannot be negative. In other words, make sure the answer you return is non negative.

Input : x = 2, n = 3, d = 3 Output : 2

2^3 % 3 = 8 % 3 = 2.