2025年1月22日
2025.1.21——1300
摘要： 2025.1.21——1300 A 1300 Qingshan has a string \(s\) which only contains \(\texttt{0}\) and \(\texttt{1}\). A string \(a\) of length \(k\) is good if an 阅读全文
posted @ 2025-01-22 11:13 Jkke 阅读(21) 评论(0) 推荐(0)