問題一覧
1
A
b
2
A
c
3
A
c
4
A
b
5
A
d
6
A
b
7
A
b
8
A
d
9
A
b
10
A
a
11
A
b
12
A
c
13
A
c
14
A
b
15
A
a
16
A
d
17
A
b
18
A
a
19
A
d
20
A
a
21
A
a
22
A
d
23
A
a
24
A
a
25
A
d
26
A
c
27
A
a
28
A
a
29
A
c
30
A
d
31
A
d
32
A
b
33
A
a
34
A
d
35
A
b
36
A
c
37
A
d
38
A
d
39
A
c
40
A
b
41
A
d
42
A
b
43
A
a
44
A
d
45
A
c
46
A
a
47
A
d
48
A
d
49
A
c
50
A
c
51
A
b
52
A
c
53
A
a
54
A
b
55
A
a
56
A
d
57
A
c
58
A
b
59
A
c
60
A
b
61
A
d
62
A
c
63
A
d
64
A
a
65
A
d
66
A
c
67
A
a
68
A
d
69
A
d
70
A
d
71
A
d
72
A
d
73
A
c
74
A
c
75
A
b
76
A
a
77
A
c
78
A
d
79
A
d
80
A
b
81
A
b
82
A
a
83
A
a
84
A
c
85
A
b
86
A
a
87
A
a
88
A
c
89
A
a
90
A
d
91
A
d
92
A
b
93
A
b
94
A
b
95
A
b
96
A
a
97
A
b
98
A
d
99
A
b