Grokking the Coding Interview: Patterns for Coding Questions
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Problem Challenge 2: Comparing Strings containing Backspaces (medium)
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Problem Statement

Given two strings containing backspaces (identified by the character ‘#’), check if the two strings are equal.

Example 1:

Input: str1="xy#z", str2="xzz#"
Output: true
Explanation: After applying backspaces the strings become "xz" and "xz" respectively.

Example 2:

Input: str1="xy#z", str2="xyz#"
Output: false
Explanation: After applying backspaces the strings become "xz" and "xy" respectively.

Example 3:

Input: str1="xp#", str2="xyz##"
Output: true
Explanation: After applying backspaces the strings become "x" and "x" respectively.
In "xyz##", the first '#' removes the character 'z' and the second '#' removes the character 'y'.

Example 4:

Input: str1="xywrrmp", str2="xywrrmu#p"
Output: true
Explanation: After applying backspaces the strings become "xywrrmp" and "xywrrmp" respectively.

Constraints:

  • 1 <= str1.length, str2.length <= 200
  • str1 and str2 only contain lowercase letters and '#' characters.

Try it yourself

Try solving this question here:

Python3
Python3
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