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