Given two strings S and T, return if they are equal when both are typed into empty text editors. # means a backspace character.
Input: S = "ab#c", T = "ad#c" Output: true
Explanation: Both S and T become "ac".
Input: S = "ab##", T = "c#d#" Output: true
Explanation: Both S and T become "".
Input: S = "a##c", T = "#a#c" Output: true
Explanation: Both S and T become "c".
Input: S = "a#c", T = "b" Output: false
Explanation: S becomes "c" while T becomes "b".
- 1 <= S.length <= 200
- 1 <= T.length <= 200
S and T only contain lowercase letters and '#' characters.
Follow up: Can you solve it in O(N) time and O(1) space?
See the full details of the problem Backspace String Compare at LeetCode