limitless number of cows on the plane, one at each point with whole number directions. Gregor is an individual from the Illuminati, and needs to construct a three-sided fence, interfacing 3 unmistakable existing wall posts. A cow stringently inside the fence is supposed to be encased. In case there are an odd number of encased cows and the space of the fence is a whole number, the fence is supposed to be intriguing. Track down the quantity of int
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Here are n posts at particular directions on a plane. It is ensured that no three fence posts lie on a similar line. There are a limitless number of cows on the plane, one at each point with whole number directions. Gregor is an individual from the Illuminati, and needs to construct a three-sided fence, interfacing 3 unmistakable existing wall posts. A cow stringently inside the fence is supposed to be encased. In case there are an odd number of encased cows and the space of the fence is a whole number, the fence is supposed to be intriguing.
Track down the quantity of intriguing wall.
Information : The primary line contains the whole number n (3≤n≤6000), the quantity of fence posts which Gregor can decide to shape the vertices of a fence.
Every one of the following n line contains two whole numbers x and y (0≤x,y≤107, x and y are even), where (x,y) is the arrange of a fence post. All fence posts lie at unmistakable directions. No three fence posts are on a similar line.
Yield output: Pint a solitary whole number, the quantity of intriguing wall. Two wall are considered unique in case they are built with an alternate arrangement of three fence posts.
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