随笔分类 - poj 题解
摘要:2483: Pku2279 Mr. Young's Picture Permutations Description Mr. Young wishes to take a picture of his class. The students will stand in rows with each
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摘要:Area Time Limit: 1000MS Memory Limit: 10000K Total Submissions: 19398 Accepted: 5311 利用叉积求多边形面积,可以分解成多个三角形 利用面积公式,S=1/2*abs((x0*y1-x1*y0)+(x1*y2-x2*y1
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