//SOL
 public static int XOR_Solve(int num, int num2) => BIT.SparseBitcount(num ^ num2);
 public static int XOR_Solve2(int num, int num2) => BIT.MyBitcount(num ^ num2);
 //SOL
 public static void IsPowerOfTwo(int num, InOut.Ergebnis erg) => erg.Setze(BIT.SparseBitcount(num) == 1);