Cow curling is a popular cold-weather sport played in the Moolympics.

Like regular curling, the sport involves two teams, each of which slides N heavy stones (3 <= N <= 50,000) across a sheet of ice. At the end of the game, there are 2N stones on the ice, each located at a distinct 2D point.

Scoring in the cow version of curling is a bit curious, however. A stone is said to be "captured" if it is contained inside a triangle whose corners are stones owned by the opponent (a stone on the boundary of such a triangle also counts as being captured). The score for a team is the number of opponent stones that are captured.

Please help compute the final score of a cow curling match, given the locations of all 2N stones.

입력

• Line 1: The integer N.
• Lines 2..1+N: Each line contains 2 integers specifying the x and y coordinates of a stone for team A (each coordinate lies in the range -40,000 .. +40,000).
• Lines 2+N..1+2N: Each line contains 2 integers specifying the x and y coordinates of a stone for team B (each coordinate lies in the range -40,000 .. +40,000).

출력

입출력 예

입력

4
0 0
0 2
2 0
2 2
1 1
1 10
-10 3
10 3

출력

1 2

INPUT DETAILS:

Each team owns 4 stones.  Team A has stones at (0,0), (0,2), (2,0), and
(2,2), and team B has stones at (1,1), (1,10), (-10,3), and (10,3).

OUTPUT DETAILS:

Team A captures their opponent's stone at (1,1).  Team B captures their
opponent's stones at (0,2) and (2,2).

출처:2014/jan/gold