LeetCode 1513. Number of Substrings With Only 1s in F#

URL Number of Substrings With Only 1s - LeetCode Code https://github.com/syohex/dotnet-study/tree/master/fsharp/leetcode/challenge/202511/number_of_substrings_with_only_1s/main.fsx let numSub (s: string) : int = let modulo = 1_000_000_007L l...