HDU 5784 How Many Triangles(极角排序)

题意: $给定N\le 2000个二维平面不重点,求形成的锐角三角形的个数$     Read more
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TaoSama Aug 04, 2016

HDU 5738 Eureka(贡献、极角排序)

题意: $N\le 10^3个点,求有多少子集共线$     Read more
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TaoSama Jul 24, 2016