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一般来讲，WA的原因有几个。1. 程序敲错了→_→； 2. 凸包最后多加了一个点←_←； 3. 对共线进行了不知道属于什么类型的判断的判断→_←； 4. 数组开小了←_→。 xián juàn qiǎ qiào 旋 转 卡 壳 Followed by:
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