Determine string transform via end-append moves

Q: Determine string transform via end-append moves

This question evaluates a candidate's understanding of string manipulation, permutation feasibility, and algorithmic optimization for computing minimal move counts.

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Question

Given two strings s and t of equal length over lowercase English letters, in one move you may delete any character from s and append it to the end of s. Determine whether s can be transformed into t using such moves, and if so, return the minimum number of moves. Explain your algorithm, prove correctness, analyze complexity, and provide code in C, C++, Java, or JavaScript.

Determine string transform via end-append moves

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