Index of an Extra Element | Problem of the day | GeeksForGeeks

You have given two sorted arrays arr1[] & arr2[] of distinct elements. The first array has one element extra added in between. Return the index of the extra element.
Note: 0-based indexing is followed.
Examples
Input: n = 7, arr1[] = {2,4,6,8,9,10,12}, arr2[] = {2,4,6,8,10,12}
Output: 4
Explanation: In the first array, 9 is extra added and it's index is 4.
Input: n = 6, arr1[] = {3,5,7,8,11,13}, arr2[] = {3,5,7,11,13}
Output: 3
Explanation: In the first array, 8 is extra and it's index is 3.
Expected Time Complexity: O(log n).
Expected Auxiliary Space: O(1).
Table of Contents
0:00 Problem Statement
0:42 Solution
4:40 Pseudo Code
6:25 Code - C++
7:25 Code - Python