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");
}