计算字符串中最大回文长度，并返回回文字符串及长度

[{"title":"（ 46 个子文件 5.4MB ） 计算字符串中最大回文长度，并返回回文字符串及长度","children":[{"title":"Palindrome","children":[{"title":"Palindrome.suo <span style='color:#111;'> 10.50KB </span>","children":null,"spread":false},{"title":"Palindrome","children":[{"title":"Palindrome.vcxproj <span style='color:#111;'> 3.83KB </span>","children":null,"spread":false},{"title":"Palindrome.vcxproj.filters <span style='color:#111;'> 948B </span>","children":null,"spread":false},{"title":"Palindrome.cpp <span style='color:#111;'> 648B </span>","children":null,"spread":false},{"title":"Debug","children":[{"title":"vc100.idb <span style='color:#111;'> 243.00KB </span>","children":null,"spread":false},{"title":"Palindrome.obj <span style='color:#111;'> 174.87KB </span>","children":null,"spread":false},{"title":"Palindrome_manifest.rc <span style='color:#111;'> 210B </span>","children":null,"spread":false},{"title":"link.2332.write.1.tlog <span style='color:#111;'> 2B 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74.00KB </span>","children":null,"spread":false},{"title":"Palindrome.ilk <span style='color:#111;'> 501.55KB </span>","children":null,"spread":false}],"spread":true},{"title":"Palindrome.sdf <span style='color:#111;'> 8.33MB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]