codewars #24 A + B == 123 (6kyu)

#24 A + B = 123

Task

Given number A you must return number B so that

(int) (A + B) == 123

Note

B can't be negative

:-)

public class Dinglemouse {
  public static long int123(final int a) {
    return Integer.toUnsignedLong(123 - a);
  }
}