Backspace String Compare

Problem Overview

• Determine if two strings become identical after applying '#' as a backspace; return 1 if equal, else 0.
• Input: s1 and s2 with lowercase letters and '#'; lengths 1 to 2*10^5; Output: int 0 or 1.
• Reflects text editor backspace behavior in string processing, relevant to real-world typing scenarios.
• Asked in Goldman interviews; a classic coding interview problem and interview question.