@Test
public void test2() { // Test case 2
int output = cr.rem(2, 0);
assertEquals("", -1, output);
}
@Test
public void test3() { // Test case 3
int output = cr.rem(100, 3);
assertEquals("", 1, output);
}
@Test
public void test1() { // Test case 1
int output = cr.rem(2, 1);
assertEquals("", 0, output);
}