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Heap Sort
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  Difficulty: Easy   Marks: 2
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Given an array of size N. The task is to sort the array elements by completing functions heapify() and buildHeap() which are used to implement Heap Sort.

Input:
First line of the input denotes number of test cases T. First line of the test case is the size of array and second line consists of array elements.

Output:
Sorted array in ascending order.

Constraints:
1 <= T <= 100
1 <= N <= 106
1 <= arr[i] <= 106

Example:
Input:
2
5
4 1 3 9 7
10
10 9 8 7 6 5 4 3 2 1

Output:
1 3 4 7 9
1 2 3 4 5 6 7 8 9 10

Explanation:
Testcase 1: After sorting elements using heap sort, elements will be in order as 1, 3, 4, 7 and 9.
 

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Amit Khandelwal
Author: kartik
Editorial


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