KöMaL 2016 K519

In ,,negadecimal'' notation, the place values of the digits of a number are the powers of 10, but with alternating signs, that is, instead of the place values 1, 10, 100, 1000 etc. of decimal notation, they are 1, $-10$, 100, $-1000$ etc. For example, $325_{-10} =3 \cdot 100 + 2\cdot (-10) + 5 \cdot 1 = 300 - 20 + 5 = 285_{10}.$ Represent the number of this year in negadecimal notation.