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数据水 暴力不考虑效率乱用1375msmap vector 什么乱七八糟的堆上去，点用的int， 判断是把直线变成ax+by+c=0然后看正负，不二分直接强行全算，ac了，算是第二道计算几何题，但仍然很水吧 Followed by:
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