Solution: Minimum Window Subsequence
Explore how to identify the shortest substring in s1 that contains all characters of s2 as a subsequence using a sliding window technique. Learn to implement two pointers to scan forward and backward, minimizing substring length while maintaining order. Understand this method's time complexity and space efficiency for coding interviews.
Statement
Given two strings, s1 and s2, find and return the shortest substring of s1 in which all the characters of s2 appear in the same order, but not necessarily next to each other (i.e., s2 should be a subsequence of the substring).
If no such substring exists, return an empty string "". If there are multiple shortest substrings, return the one that appears first in s1 (i.e., with the left-most starting index).
Note: A substring is a contiguous sequence of characters within a string. A subsequence is a sequence of characters that can be derived from a string by deleting some characters without changing the order of the remaining characters. For example, “edu” is a substring and “cave” is a subsequence of “educative.”
Constraints:
s1.length...