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How about using two pointers ??
- princeelectric October 11, 2012Algo :
1. Keep one pointer at start and other at the end.
2. Move first pointer and move second pointer until it finds element pointer by first.
3. If first and second points to same element then exit
4. If it does find a hit then keep track of indexes which are matched.
This is similar to reversing a string, but with out using extra string object.