Substrings of Strings

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Problem description: Felix currently has a group of strings, S1,S2,S3...SN and each string has N characters. He wants to print the largest substring of string S such that all characters in that substring are distinct, wich means, no two characters in that substring can be the same. A substring of string S is a sequence that can be created from S by deleting some characters and without changing th

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solution.cppC++17

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