What will this code print on the screen?

int f1 (int a, int b)
{
if (a > b)
{
printf("A is greater than B\n");
return 1;
}
else
{
printf("B is greater than A");
return 0;
}
}

main()
{
if (f1(20,10) || f1(10,20))
printf("C is fun!\n");
}