要把输入点打乱然后计算，~~我题解里的代码最后说了，我也是卡第二个点~~
by TimeTraveller @ 2018-05-07 20:43:02
@ yeszy,强烈要求开spj，卡精度
by Mark_ZZY @ 2018-10-10 13:25:17
@[yeszy](/space/show?uid=29) ,强烈要求开spj，卡精度
by Mark_ZZY @ 2018-10-10 13:25:32
@[chen_zhe](/space/show?uid=8457) ,强烈要求开spj，卡精度
by Mark_ZZY @ 2018-10-10 13:26:40
是我打错了，打扰了
by Mark_ZZY @ 2018-10-10 13:53:49
+1
by 风浔凌 @ 2019-03-05 09:54:03