HBC223734[NOIP1999]拦截导弹,线性dp,动态规划HoppingRabbit题解

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Little Rabbit loves hopping. He always hops around on the grassland. But dangers are lurking there --- the hunters have setnnntraps. Once Little Rabbit falls into a trap, his life will be threatened. Therefore, Little Rabbit has to keep away from those traps. Let's use two-dimensional Cartesian coordinate system to describe the grassland. We can regard Little Rabbit as a point, and regard traps as rectangles on the plane. The sides of the rectangles are parallel to the coordinate axes. We use two points to describe a rectangle --- the lower left pointand the upper right point(x1

Little Rabbit loves hopping. He always hops around on the grassland. But dangers are lurking there --- the hunters have set nnn traps. Once Little Rabbit falls into a trap, his life will be threatened. Therefore, Little Rabbit has to keep away from those traps. Let's use two-dimensional Cartesian coordinate system to describe the grassland. We can regard Little Rabbit as a point, and regard traps as rectangles on the plane. The sides of the rectangles are parallel to the coordinate axes. We use two points to describe a rectangle --- the lower left point (x1,y1)(x_1,y_1)(x1​,y1​) and the upper right point (x2,y2)(x_2,y_2)(x2​,y2​) (x1

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标签： HBC223734[NOIP1999]拦截导弹 线性dp 动态规划HoppingRabbit题解