鉴于:
setA = [(1, 25), (2, 24), (3, 23), (4, 22), (5, 21), (6, 20),
(7, 19), (8, 18), (9, 17), (10, 16), (11, 15), (12, 14),
(13, 13),(14, 12), (15, 11), (16, 10), (17, 9), (18, 8),
(19, 7),(20, 6), (21, 5), (22, 4), (23, 3), (24, 2), (25, 1)]
setB = [(1, 19), (2, 18), (3, 17), (4, 16), (5, 15), (6, 14), (7, 13),
(8, 12), (9, 11), (10, 10), (11, 9), (12, 8), (13, 7), (14, …