marioarranzr/sainsburysgopherconukchallenge2018

Sainsbury's GopherCon UK Challenge 2018

One of our delivery riders has been given some very confusing instructions. On a (seemingly endless) grid of houses, he has to deliver to each house he arrives at.

His instructions are given as a string consisting of one of four characters:

• ^ to move north one square
• > to move east one square
• v to move south one square
• < to move west one square

To the bemusement of the rider, this means some houses has more than one delivery

The challenge

Complete calculateHouses(input string) int function to work out how many unique houses the rider visits.

This also includes the house he starts at.

Completion

The challenge is complete when all the unit tests pass run with ginkgo (github.com/onsi/ginkgo/ginkgo) or go test.

Examples

If our rider is given '>>', he visit 3 houses:

• The house he starts at, before moving east
• The next house,before moving east again
• The final house

If our rider is given '^>v<', he visit 4 houses:

• The house he starts at, before moving north
• The next house, before moving east
• The next house, before moving south
• The next house, before moving west
• This brings him back to the house he started at, where he has already made a delivery