private void ValidateResult(string s, bool expected) { Assert.AreEqual( expected, Question_1_4.IsPalindromePermutationFast(s), $"IsPalindromePermutationFast failed with {s}"); Assert.AreEqual( expected, Question_1_4.IsPalinromePermutationMinSpace(s), $"IsPalinromePermutationMinSpace failed with {s}"); }