typedef struct {
	char *name;
	char *course;
} Item;

#define key(A) (A.name)
#define lt(A, B) (strcmp(key(A), key(B)) < 0)
#define le(A, B) (strcmp(key(A), key(B)) <= 0)
#define ge(A, B) (strcmp(key(A), key(B)) >= 0)
#define gt(A, B) (strcmp(key(A), key(B)) > 0)


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;
}