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String Wars

By Dennis Shasha

Communications of the ACM, Vol. 61 No. 7, Page 104
10.1145/3219818

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Suppose someone gives you two strings: X and Y. Your goal is to design a minimum-cost collection of smaller strings coll (X|Y) that match and cover every character of string X With order independence without matching any substring of string Y.

Let us first break down that last sentence:

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