A recursive approach (which is what I would use) would involve breaking the problem into isomorphic subproblems: to find all permutations of a string, find all permutations of the string without a ...
using System; using System.Numerics; namespace ImprovedPermutations { class PermutationsProgram { static void Main(string[] args) { Console.WriteLine("\nBegin improved permutations with BigInteger ...
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