Editorial for GFSSOC '14 Winter J2 - Wow much parking lot

Remember to use this editorial only when stuck, and not to copy-paste code from it. Please be respectful to the problem author and editorialist.
Submitting an official solution before solving the problem yourself is a bannable offence.

Keep track of $x$ ~x~ and $y$ ~y~ coordinates after each order.

North adds $B$ ~B~ to the $y$ ~y~ value.
South subtracts $B$ ~B~ from the $y$ ~y~ value.
East adds $B$ ~B~ to the $x$ ~x~ value.
West subtracts $B$ ~B~ from the $x$ ~x~ value.

Skills needed: Implementation

Time complexity: $\mathcal O(N)$ ~\mathcal O(N)~

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