POJ1696 Space Ant(貪心、向量叉乘、向量極角、線段相交、點在線段上)

題目鏈接:   http://poj.org/problem?id=1696 題目描述: Space Ant   Description The most exciting space discovery occurred at the end of the 20th century. In 1999, scientists traced down an ant-like creature in
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