# Gray Code Encoder

## Details

The reflected binary code (RBC), also known as Gray code, is an ordering of the binary numeral system such that two successive values differ in only one bit (binary digit).

For example, the representation of the decimal value `1` in binary
would normally be `001` and `2` would be `010`. In
Gray code, these values are represented as `001` and `011`.
That way, incrementing a value from 1 to 2 requires only one bit to
change, instead of two.

For each numeric argument in decimal form, print the same number in reflected binary (Gray code) form.

The numbers range from 0 to 4095 inclusive.