def test_case_2(): assert zombit_antidote.answer([[0, 1000000], [42, 43], [0, 1000000], [42, 43]]) == 1
def test_case_1(): assert zombit_antidote.answer([[0, 1], [1, 2], [2, 3], [3, 5], [4, 5]]) == 4