source: https://leetcode.com/problems/shortest-way-to-form-string/description/ Shortest Way to Form String A subsequence of a string is a new string that is formed from the original string by deleting some (can be none) of the characters without disturbing the relative positions of the remaining characters. (i.e., “ace” is a subsequence of “abcde” while “aec” is not). Given two strings ...