Given two numbers A and B, find Kth digit from right of AB.
Example 1:
Input:
A = 3
B = 3
K = 1
Output:
7
Explanation:
33 = 27 and 1st
digit from right is
7
Example 2:
Input:
A = 5
B = 2
K = 2
Output:
2
Explanation:
52 = 25 and second
digit from right is
2.
Your Task:
You don't need to read input or print anything. Your task is to complete the function kthDigit() which takes integers A, B, K as input parameters and returns Kth Digit of AB from right side.
Expected Time Complexity: O(log AB) Expected Space Complexity: O(1)
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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