Q37

Consider the following program: int f (int * p, int n) { if (n <= 1) return 0; else return max (f (p+1, n-1), p[0] - p[1]); } int main () { int a[] = {3, 5, 2, 6, 4}; printf(" %d", f(a, 5)); } Note: $\max (x, y)$ returns the maximum of $x$ and $y$. The value printed by this program is ________.