Leetcode 1247. Minimum Swaps to Make Strings Equal
Given two equal-length strings of only 'x' and 'y', compute the minimum number of swaps between the strings (swap s1[i] with s2[j]) to make them identical or return -1 if impossible. Key idea: count mismatches of type "s1='x', s2='y'" and "s1='y', s2='x'"; pair same-type mismatches (one swap per pair) and handle any two opposite leftovers with two swaps, otherwise it's impossible if total mismatches is odd.
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Late November, 2024
Mid-level
Find the minimum number of contiguous swaps required to transform one list of strings into another. Given two lists of strings with the same set of elements and no duplicates within each list, determine the minimum number of adjacent element swaps needed to convert one list into the other.
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