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