Right-of-Way

ID: vajningsplikt

Difficulty: 2.1

CPU Time: 1 second

Memory: 1024 MB

Solution

Map directions to something more easy to parse, such as integers, N = 0, E = 1, S = 2, W = 3. Then, translate a, b, and c to these values. Thus, case 1 is if we are leaving 2 away from where we approached, and we are to the left of whoever approaches. Case 2 is if we leave 1 more than we approach, and the approaching vehicle is not from our left.