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because the last pair formed will be of the size m and we need out loop to go till n-m . if we go forward (n-m) even one step then m size of pair will not be formed as there are no more elements in array
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why i<=n-m is used for?
because the last pair formed will be of the size m and we need out loop to go till n-m . if we go forward (n-m) even one step then m size of pair will not be formed as there are no more elements in array