Backspace String Compare

Easy

Problem

Given two strings s and t, return true if they are equal when both are typed into empty text editors. '#' means a backspace character.

Note that after backspacing an empty text, the text will continue empty.

Input: s = "ab#c", t = "ad#c"

Output: true

Both s and t become "ac".

Input: s = "ab##", t = "c#d#"

Output: true

Both s and t become "".

Input: s = "a#c", t = "b"

Output: false

s becomes "c" while t becomes "b".

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