2083-求以相同字母开头和结尾的子串总数

Raphael Liu Lv10
  2023-09-13 00:47:26 2023-09-13 00:47:26 Created   2023-09-13 11:12:45 2023-09-13 11:12:45 Updated    
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2083-求以相同字母开头和结尾的子串总数