public static IDictionary <char, int> Solve(AlphameticsEquation equation)
{
_equation = equation;
var letterCount = LetterCountCombinations(equation).FirstOrDefault(IsSolution) ?? throw new ArgumentException();
return(SolutionForLetterCount(letterCount));
}
public static IDictionary <char, int> Solve(AlphameticsEquation vobjEquation)
{
mobjEquation = vobjEquation;
int[] intLetterCount = LetterCountCombinations(vobjEquation).FirstOrDefault(IsSolution);
if (intLetterCount == null)
{
throw new ArgumentException();
}
return(SolutionForLetterCount(intLetterCount));
}
private static IEnumerable <int[]> LetterCountCombinations(AlphameticsEquation equation) => Enumerable.Range(0, 10) .ToArray() .Permutations(equation.LettersWithCount.Count);
