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POJ 1584 A Round Peg in a Ground Hole（判断凸多边形，判断圆是否在凸多边形内）

来源：互联网 
The DIY Furniture company specializes in assemble-it-yourself furniture kits. Typically, the pieces of wood are attached to one another using a wooden peg that fits into pre-cut holes in each piece to be attached. The pegs have a circular cross-section and so are intended to fit inside a round hole. The DIY Furniture company specializes in assemble-

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