What is the output(#36)?

Question

#include <stdio.h>

int main()

{

int *ptr1, *ptr2, i = 1, j = 2;

ptr1 = &i; ptr2 = &j;

ptr2 = ptrl;

*ptr1 = *ptr1 + *ptr2;

*ptr2 = 2*(*ptr2);

  printf("Val = %d\n", *ptr1 + *ptr2);

 return 0;

         }

 

    References: C From Theory