You are given two integer numbers, the base a and the index b. You have to find the last digit of ab.
a = "3", b = "10"
310 = 59049. Last digit is 9.
a = "6", b = "2"
62 = 36. Last digit is 6.
You don't need to read input or print anything. Your task is to complete the function getLastDigit() which takes an Strings a, and b as input and returns the answer.
Expected Time Complexity: O(|b|)
Expected Auxiliary Space: O(1)
1 <= |a|,|b| <= 1000
Note: There will not be any test cases such that ab is undefined.
We strongly recommend solving this problem on your own before viewing its editorial. Do you still
want to view the editorial?
Login to access your submissions.