$1,000,000,000$ 建议改成 $10^9$
by 江户川·萝卜 @ 2020-11-15 09:57:15
可在这里反馈：<https://www.luogu.com.cn/discuss/show/183512>
by hensier @ 2020-11-15 10:11:13
@[shenyouran](/user/137367) 谢
by int64 @ 2020-11-15 12:47:00