#include <stdio.h>

int f1();
int f2();

int main()
{
 printf("%d\n", f1());   // 0
 printf("%d\n", f1());   // 0
 printf("%d\n", f2());   // 2
 printf("%d\n", f1());   // 1
 printf("%d\n", f2());   // 3
 printf("%d\n", f1());   // 2
 return 0;
}


#ifdef GBLOBALVAR

int count1 = 0;
int count2 = 0;

int f1(void)
{
  count1++;
  return count2;
}
  
int f2(void)
{
  count2++;
  return count1;
}


#else

int hidden(int i)
{
  static int a[2] = {};
  a[i]++;
  return a[1-i];
}

int f1(void)
{
  return hidden(0);
}


int f2(void)
{
  return hidden(1);
}


#endif