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overhead of String comparision over int

refer to the last 2 successful submissions on my codechef site for the permut problem

https://www.codechef.com/problems/PERMUT2

As you can see, the only difference is use of int[] in place of string[] and hence comparing the int[] with each other as opposed to string[] with each other.

one with int[] is ~40% faster than with String[]

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