基本情况 AB秒了。C跨度有点太大，题解暂时都还没理解。 C. Recover an RBS Problem - C - Codeforces 待补题本栏目推荐文章NSSCTF Round#16 Basic WriteUpHey left 1 Codeforces Round 918 (Div. 4)CodeForces 1312G AutocompletionEducational Codeforces Round 152 (Rated for Div. 2)codeforces 918 div4CF Beta Round 93-D.Fibonacci Sums-齐肯多夫分解、DPCodeForces 1329D Dreamoon Likes StringsCodeForces 1237H Balanced Reversalsvp Codeforces Round 915 (Div. 2)Codeforces [Hello 2024]