Remove All Occurrences of a Substring

Problem Description

Given two strings s and part, perform the following operation on s until all occurrences of the substring part are removed:

• Find the leftmost occurrence of the substring part and remove it from s. Return s after removing all occurrences of part.

Key Insights

• The problem requires iterative removal of a substring from a string until none are left.
• The leftmost occurrence should be targeted for removal each time.
• The solution can utilize string manipulation techniques to efficiently find and remove the substring.

Space and Time Complexity

Time Complexity: O(n * m), where n is the length of string s and m is the length of substring part. In the worst case, we may have to scan the entire string multiple times. Space Complexity: O(1) if we consider the output string to be the only additional space used, or O(n) for the new string created in the process.

Solution

To solve this problem, we can use a simple iterative approach with string manipulation. We will repeatedly search for the substring part in the string s and remove it until it can no longer be found. The algorithm utilizes the built-in string search function to locate the substring and constructs a new string each time a removal occurs.

Code Solutions