typedef int Item;
#define key(A) (A)
#define lt(A, B) (key(A) < key(B)) // less than
#define le(A, B) (key(A) <= key(B)) // less than or equal to
#define ge(A, B) (key(A) >= key(B)) // greater than or equal to
#define gt(A, B) (key(A) > key(B)) // greater than


void sort(Item a[], int lo, int hi) {
    return;
}

void swap(Item a[], int i, int j) {
    Item temp = a[i];
    a[i] = a[j];
    a[j] = temp;
}

int main(void) {
    return 0;
}