摘要：
Equivalent SetsTime Limit: 12000/4000 MS (Java/Others)Memory Limit: 104857/104857 K (Java/Others)Total Submission(s): 1794Accepted Submission(s): 615Problem DescriptionTo prove two sets A and B are equivalent, we can first prove A is a subset of B, and then prove B is a subset of A, so finally we go 阅读全文