你为啥先 `build` 再输入 `a[i]` 啊
by Sya_Resory @ 2021-08-26 20:11:46
@[Sya_Resory](/user/114082) ……谢谢
by 一只大龙猫 @ 2021-08-26 20:13:01
qndmx
by Lemon_X @ 2021-08-26 20:13:18
还有 要开 `long long` （
@[一只大龙猫](/user/511907)
by Sya_Resory @ 2021-08-26 20:13:33
@[Sya_Resory](/user/114082) 进行修改之后A了，谢谢
by 一只大龙猫 @ 2021-08-26 20:15:09
xswl
by WRuperD @ 2021-08-26 20:16:38