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1) Similar idea of using two points to detect whether there is any cycle or not.
2) Also, pay attention to the differece between C++ and Java about their operator priority. C++ (index++>positionFromTail) equals to (++index>positionFromTail) !
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1) Similar idea of using two points to detect whether there is any cycle or not.
2) Also, pay attention to the differece between C++ and Java about their operator priority. C++ (index++>positionFromTail) equals to (++index>positionFromTail) !