投稿

Codeforces 962F. Simple Cycles Edges (BCC)

Codeforces 1051F. The Shortest Statement (Shortest Path + LCA)

Codeforces 1062E. Company (LCA+RMQ)

Dancing Links, Exact Cover Problem(舞蹈链精确覆盖问题,高效解数独)

Codeforces 1059E. Split the Tree (树上贪心)