#include <stdio.h>
#include <math.h>

int main()
{

    int size = 6;
    int arr[] = {7,4,2,6,3,5};

    // [7,4,2,6,3]
    // [2,6,4,7]


    // i != j // size is odd
    // i > j // size is even

    for (int i =0, j=size-1; i < j; i++,j--) {
        int temp = arr[i];
        arr[i] = arr[j];
        arr[j] = temp;
    }

    for (int i = 0; i < size; i++) printf("%d ",arr[i]);

    return 0;
}