def test_value_n_from_end():
l = SingleLinkedList()
for i in range(10):
l.push_back(i)
assert l.value_n_from_end(0) == 9
assert l.value_n_from_end(3) == 6
def test_value_n_from_end():
l = SingleLinkedList()
for i in range(10):
l.push_back(i)
assert l.value_n_from_end(0) == 9
assert l.value_n_from_end(3) == 6
