The string APPAPT contains two PAT’s as substrings. The first one is formed by the 2nd, the 4th, and the 6th characters, and the second one is formed by the 3rd, the 4th, and the 6th characters.The string APPAPT contains two PAT’s as
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1093 Count PAT‘s (思维题)_QLUGCL的博客
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