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使用右移算法的看这组数据3 2 0 0 1 2 4 0 正确答案为2，错误算法的答案会是1 （0，0）能和（1，2）在一个圈内；（0，0）能和（4，0）在一个圈内。 但是3个点不能同时在一个圈内，使用右移方法往往会忽视这点。 Followed by:
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