811
0
20
2807
7
20
684
0
20
1251
0
19
448
0
19
823
0
19
373
0
19
781
0
19
731
0
19
401
0
18
1249
0
18
715
0
18
474
0
18
959
2
18
1003
0
18
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Keyword(s): 数の性質