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    I am confused 😕 ! What does ordered/unordered means in this context? Is it related to ascending order and descending order? If so, List is not ordered 😕 Commented Jan 11, 2017 at 18:38
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    Ordered is when the input data are arranged exactly as inputted by the user whereas Sorted is when the input data is sorted lexicographically or ascending/descending order(in terms of integer values). Unordered means that the input data may or maynot be stored in the user inputted order. Commented Mar 22, 2017 at 8:33