public string SolveSecondTask() { _ruleBook[8] = new PositionRule("42 | 42 8", _ruleBook); _ruleBook[11] = new PositionRule("42 31 | 42 11 31", _ruleBook); int validOnes = Solve(); return($"{validOnes}"); }
static PositionRule() { Instance = new PositionRule(); }