#include <stdio.h>
 void nextGreatest(int arr[], int size)
{
 
  int max_from_right =  arr[size-1];
  arr[size-1] = 0;
 
  for(int i = size-2; i >= 0; i--)
  {
    int temp = arr[i];
    arr[i] = max_from_right;
    if(max_from_right < temp)
       max_from_right = temp;
  }
}
void printArray(int arr[], int size)
{
  int i;
  for (i=0; i < size; i++)
    printf("%d ", arr[i]);
  printf("\n");
}
int main()
{
  int arr[] = {6, 7, 4, 3, 5, 2};
  int size = sizeof(arr)/sizeof(arr[0]);
  nextGreatest (arr, size);
  printf ("The modified array is: \n");
  printArray (arr, size);
  return (0);
}
 

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NiwgNywgNCwgMywgNSwgMg==

6, 7, 4, 3, 5, 2