An array contains both positive and negative numbers in random order. Rearrange the array elements so that all negative numbers appear before all positive numbers.
Input : -12, 11, -13, -5, 6, -7, 5, -3, -6 Output :-12 -13 -5 -7 -3 -6 11 6 5
Note :- Order of elements is not important here.
The idea is to simply apply partition process of quicksort.
-1 -3 -7 4 5 6 2 8 9
Time complexity: O(n)
Auxiliary Space: O(1)
The problem becomes difficult if we need to maintain order of elements. Please refer Rearrange positive and negative numbers with constant extra space for details.
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