Definition: An ordered deque, that is, items may only be added to or removed from the head or the tail. An item is added to the head if it is smaller than the current head. An item is added to the tail if it is greater than the current tail. Items are never inserted into the middle, rather, an additional pile may be created.
See also linked list, UnShuffle sort.
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Entry modified 17 December 2004.
HTML page formatted Fri Feb 23 10:06:08 2018.
Cite this as:
Art S. Kagel, "pile", in Dictionary of Algorithms and Data Structures [online], Vreda Pieterse and Paul E. Black, eds. 17 December 2004. (accessed TODAY) Available from: https://www.nist.gov/dads/HTML/pile.html