#include <stdio.h>

int x = -1;

void fun1 ()
{
   printf ("%d\n", x);
}

void fun2 (int x)
{
   x = 1;
   printf ("%d\n", x);
   {
       int x = 3;
       x = x * x;
       printf ("%d\n", x);
   }
   printf ("%d\n", x);
}


int
main ()
{
   printf ("%d\n", x);
   x = x + x;
   fun1();
   fun2(x);
   printf ("%d\n", x);
}