quick sort
Can someone explain how this works and how can i do the exact process for this array [7,-3,12,5,-1,5,0,16,9,7] since there is same numbers in this list im confused about it I also didnt understand in this process there is p q j and r. In the videos i have watched on youtube there is only i and j. The picture i sent is from khan academy and this is the format i will be having in the exam so im tryna understand it. Thank you for the responses

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QuickSort only needs a single comparison operation. If it compares elements to the pivot, it an just always treat the same element as smaller, always treat it as bigger or just leave the element as is pretty much
depending on your exact implementation
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