2025年1月19日
2025.1.18——1300
摘要： 2025.1.18——1300 A 1300 There are \(n\) cities located on the number line, the \(i\)-th city is in the point \(a_i\). The coordinates of the cities are 阅读全文
posted @ 2025-01-19 22:05 Jkke 阅读(40) 评论(0) 推荐(0)