问题一1的求解相对简单，应该是
$$
\displaystyle\frac{1}{\sum_{i=1}^ni}
$$
吧……
by BGM114514 @ 2024-04-14 10:58:10
@[BGM114514](/user/705058) 错了，下面内个应该是求积符号
by BGM114514 @ 2024-04-14 10:59:26
@[exdtables](/user/359675)
by BGM114514 @ 2024-04-14 11:05:59
@[BGM114514](/user/705058) 我没想明白您的答案是否合理，您能更详细地解释吗
by exdtables @ 2024-04-14 11:23:31
@[exdtables](/user/359675) 楼上显然不对，随便 $n^2$ 打个表，验证一下就不是。
n=1:1/2
n=2:5/12
...
by hyx_0704 @ 2024-04-14 18:05:26
$n^2$ 很简单，再优化很难
by hyx_0704 @ 2024-04-14 18:15:25