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sorting


  • inversions in a sequence is a pair of elements that are out of order with respect to the ordering relation. a sorting algorithm is a sequence of operations that reduces inversions to zero.

  • a topological sort of a directed graph is a way of ordering the list of nodes such that if (a, b) is a edge of the graph, then a appears before b. this type of sorting does not work if a graph has cycles or is not directed.

  • because of their efficiencies, you usually want to use either merge sort or quick sort (O(N log (N)).

  • other type of sorting algorithms can be seen below and in this directory's source code: