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应该指出来，这道题里的子序列是要连续吧wiki上的子序列的定义：在数学中，某个序列的子序列是从最初序列通过去除某些元素但不破坏余下元素的相对位置而形成的新序列。 而不是索引值一定要连续。。。 Followed by: Post your reply here: |
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