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.
1 <= s.length, t.length <= 200s and t only contain lowercase letters and '#' characterss = "ab#c", t = "ad#c"trues = "ab##", t = "c#d#"trues = "a#c", t = "b"false