Is a point in a convex polygon?
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Given a convex polygon and a point, is the point inside the 
polygon?  The point is represented by its x- and y-coordinates 
and the polygon is represent by the number of points followed
by the x- and y-coordinates of its points (in clockwise order).

Input
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The input begins with a single positive integer on a line by itself 
indicating the number of cases following, each of them on a line as 
described below.  Each case is described by integers: 
x0 y0 n x1 y1 ... xn yn.  (x0, y0) represents the point and 
(x1, y1),..., (xn, yn) represent the points of the polygon in
clockwise order.

Output
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For each test case, the output is true if the point is within the
polygon and false otherwise.

Sample input
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3
0 0 4 0 0 0 10 10 10 10 0
5 5 4 0 0 0 10 10 10 10 0
11 10 4 0 0 0 10 10 10 10 0

Sample output
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true
true
false