Solution: Find the Difference
Explore how to identify the index of an extra character in one string compared to another using bitwise XOR. Understand and implement an optimized approach in C++ that efficiently solves this problem with linear time and constant space complexity.
Statement
Given two strings, str1 and str2, find the index of the extra character that is present in only one of the strings.
Note: If multiple instances of the extra character exist, return the index of the first occurrence of the character in the longer string.
Constraints:
-
str1.length,str2.length - Either
str2.lengthstr1.length + 1, or,str1.length