int printf(const char format[], ...);
int scanf(const char format[], ...);

void should_be(int expected, int actual) {
    if (expected != actual) {
        printf("Expected %d, but got %d\n", expected, actual);
    } else {
        printf("Passed\n");
    }
}

int* p = 0;
int f1() {
    int a = 1;
    return *(a+(a+(a+(a+(a+(a+(a+(a+(a+(a+(p))))))))))); // p[10]
}


int main() {
    int a[15];
    p = a;
    for (int i = 0; i < 15; a[i] = i, ++i);
    p -= 5;
    should_be(5, f1());
    should_be(5, a - p);
    should_be(10, 5);
}