传送门：洛谷 CF2194C Secret message | Codeforces C. Secret message更佳的阅读体验：CF2194C 题...
传送门：洛谷 CF2167G Mukhammadali and the Smooth Array | Codeforces G. Mukhammadali...
传送门：洛谷 CF2148C Pacer | Codeforces C. Pacer更佳的阅读体验：CF2148C 题解简要题意：FJ 第 $0$ 分钟位...
传送门：洛谷 CF2148D Destruction of the Dandelion Fields | Codeforces D. Destructio...