Timer is Running

Greater on right side
Submissions: 190   Accuracy:

32.09%

  Difficulty: Basic   Marks: 1

You are given an array Arr of size N. Replace every element with the next greatest element (greatest element on its right side) in the array. Also, since there is no element next to the last element, replace it with -1.

Example 1:

Input:
N = 6
Arr[] = {16, 17, 4, 3, 5, 2}
Output:
17 5 5 5 2 -1
Explanation: For 16 the greatest element 
on its right is 17. For 17 it's 5. 
For 4 it's 5. For 3 it's 5. For 5 it's 2. 
For 2 it's -1(no element to its right). 
So the answer is 17 5 5 5 2 -1

Example 2:

Input:
N = 4
Arr[] = {2, 3, 1, 9}
Output:
9 9 9 -1
Explanation: For each element except 9 the
greatest element on its right is 9.
So the answer is 9 9 9 -1

Your Task:  
You don't need to read input or print anything. Your task is to complete the function nextGreatest() which takes the array of integers arr and n as parameters and returns void. You need to change the array itself.

Expected Time Complexity: O(N)
Expected Auxiliary Space: O(1)

Constraints:
1 <= N <= 105
1 <= Arri <= 106

 

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

Author: rajatjha


If you have purchased any course from GeeksforGeeks then please ask your doubt on course discussion forum. You will get quick replies from GFG Moderators there.



Need help with your code? Please use ide.geeksforgeeks.org, generate link and share the link here.


to report an issue on this page.