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Grokking the Coding Interview Patterns in C++

Solution: Find the Difference

Explore how to find the index of an extra character between two strings by applying bitwise XOR operations in C++. Understand the step-by-step process to optimize this problem for linear time and constant space complexity, enhancing your problem-solving skills for coding interviews.

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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:

  • 0≤0 \leq str1.length, str2.length ≤1000\leq 1000
  • Either str2.length == str1.length + 1, or, str1.length ==
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