Roman Numerals

Create 2 functions:

• Encode(n int) (string, bool) - takes an integer as its parameter and returns a string containing the Roman numeral representation of that integer.
• Decode(s string) (int, bool) - takes a Roman numeral as its argument and returns its value as a numeric decimal integer.

Second bool parameter must be false if Encode/Decode is unable.

Examples

// MCMXC, true
Encode(1990)

// 2008, true
Decode("MMVIII")

Run tests with benchmarks

go test -bench .