You are currently at a point (x,y) inside a rectangle. The rectangle's bottom left corner is at (0,0) and its top right corner is at (w,h). Return the shortest distance you must travel in order to reach the rectangle's boundary.
|-||w and h will be between 2 and 1000, inclusive.|
|-||x will be between 1 and w - 1, inclusive.|
|-||y will be between 1 and h - 1, inclusive.|