解答
(1) 1 (2) 1 (3) 1 (4) 3 (5) 3
(6) 2 (7) 4(8)3(9)4(10)4
(11) 4(12)3(13)2(14)4(15)1
(16)2(17)4(18)3(19)1(20)1
(21)2(22)3(23)1(24)4(25)2
(26)1(27)2(28)1(29)2(30)3
(31)4(32)1(33)3(34)4(35)4
(36)2(37)3(38)4(39)4(40)2
(41)3(42)2(43)2(44)4(45)3
(46)2(47)1(48)3(49)1(50)4
(51)2(52)4(53)3(54)2(55)4
(56)1(57)4(58)4(59)3(60)2
(61)3(62)1(63)4(64)3(65)4
(66)2(67)1(68)2