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写给TLE的朋友我是用DP做的。 一开始把坐标放在最外层循环，然后枚举在该坐标之后的所有building，得到下一个坐标点。TLE。 后来换成把building放在外层循环，然后根据建筑物高度枚举可选的坐标点范围，ac。 Followed by:
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