摘要:
Brackets SequenceTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 11854Accepted: 3164Special JudgeDescriptionLet us define a regular brackets sequence in the following way: 1. Empty sequence is a regular sequence. 2. If S is a regular sequence, then (S) and [S] are both regular sequences. 3. 阅读全文