建议本题评黄

P2785 物理1（phsic1）- 磁通量

求多边形面积评黄不合理吧
by HarunluoON @ 2022-11-17 18:18:19

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可是凸包是蓝色的QAQ
by _WAlkingDead @ 2022-11-17 19:18:53

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