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How do you rearrange values in an array?
RearrangeArray(arr[], n)
- Sort the array in ascending order.
- Take two index variables i and j to that point to two endpoints of the array (i.e., i = 0 and j = n-1).
- Create an auxiliary array A[] and initialize an index k with 0.
- Do while (i < j) A[k++] = arr[i++] A[k++] = arr[j–]
- Print A[].
How do you make an array sorted?
Approach: Traverse the given array and for every element which is greater than or equal to the previously taken element, add this element to another array else skip to the next element. In the end, the newly created array will be sorted according to Stalin sort.
What is the best sort algorithm?
The time complexity of Quicksort is O(n log n) in the best case, O(n log n) in the average case, and O(n^2) in the worst case. But because it has the best performance in the average case for most inputs, Quicksort is generally considered the “fastest” sorting algorithm.
How to sort an array in wave form?
Given an unsorted array of integers, sort the array into a wave like array. An array ‘arr [0..n-1]’ is sorted in wave form if arr [0] >= arr [1] <= arr [2] >= arr [3] <= arr [4] >= ….. A Simple Solution is to use sorting. First sort the input array, then swap all adjacent elements.
How to sort an array in O ( n ) time?
This can be done in O (n) time by doing a single traversal of given array. The idea is based on the fact that if we make sure that all even positioned (at index 0, 2, 4, ..) elements are greater than their adjacent odd elements, we don’t need to worry about odd positioned element.
How to sort an array in decreasing order?
Recommended: Please try your approach on {IDE} first, before moving on to the solution. This problem is similar to sort an array in wave form. A simple solution is to sort the array in decreasing order, then starting from second element, swap the adjacent elements.
How to iterate over an array of length n?
An efficient solution is to iterate over the array and swap the elements as per the given condition. If we have an array of length n, then we iterate from index 0 to n-2 and check the given condition. At any point of time if i is even and arr [i] > arr [i+1], then we swap arr [i] and arr [i+1].