每次读入 ``a``，然后 ``* maxn`` 才能提高精度啊
by DepletedPrism @ 2019-08-01 21:04:13
@[DepletedPrism](/space/show?uid=109751)
orz先加再乘与先乘再加的区别是？
by VTloBong @ 2019-08-01 21:19:19
@[123456L](/space/show?uid=212187) 抱歉看错了，话说 30pts 的提交好像是爆 long long 了 = =
by DepletedPrism @ 2019-08-01 21:35:40
@[123456L](/space/show?uid=212187) 不过为了提高精度，应该是要先乘再加的
```cpp
// 四舍五入不用转成 long long 的
const long double BASE = 1000000.0;
long double a, b;
while (scanf("%Lf", &a) == 1) b += a * BASE;
printf("%.5Lf", b / BASE);
```
by DepletedPrism @ 2019-08-01 21:38:54
@[DepletedPrism](/space/show?uid=109751) 感谢大佬
by VTloBong @ 2019-08-02 07:46:25