摘要：
Let 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 [ 阅读全文
posted @ 2017-07-31 21:01
Dancingflower
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摘要：
A. The Useless Toy time limit per test: 1 second time limit per test: 1 second memory limit per test: 256 megabytes memory limit per test: 256 megabyt 阅读全文
posted @ 2017-07-31 16:00
Dancingflower
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