java - Find duplicates in unsorted string array - O(nlogn) -


i got array of string hash values, example: "123-51s-12as-dasd1-das-41c-sadasdgt-31". need find out if there duplicates. catch is, need find them in o(nlogn).

1) idea:

to use binary-search algorithm. binary-search works sorted numeric array. ask: there way sort string array ?

2) open other answers. question is: how find duplicates in array of unknown strings - nlogn.

since time bound nlog(n), safely first sort array, , scan left right check duplicated strings.


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