@Test
public void shouldReturnfalseFor2_1_1_2_1() {
int[] nums = {2, 1, 1, 2, 1};
assertFalse(pts.canBalance(nums));
}
@Test
public void shouldReturnTrueFor1_1_1_2_1() {
int[] nums = {1, 1, 1, 2, 1};
assertTrue(pts.canBalance(nums));
}