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555555555555555555555555555555555555555555555555555555WA了N次了................. 求了凸包后.....枚的...........还能怎么错... 2个点不用说了...1个点都没问题啊........................ TJU当年都交过了.............这个居然.......................... 数组开到6w了......更不会是因为这个了... 郁闷啊.............. Followed by:
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