LeetCode 1061. Lexicographically Smallest Equivalent String in F#

URL https://leetcode.com/problems/lexicographically-smallest-equivalent-string/description/?envType=daily-question&envId=2025-06-05 Code https://github.com/syohex/dotnet-study/blob/master/fsharp/leetcode/challenge/202506/lexicographically_smallest_eq...