982
0
50
1660
4
50
800
3
50
412
0
50
2002
9
50
2834
5
50
1927
3
50
1038
0
50
2321
2
50
1608
8
50
1200
0
50
1315
3
50
1421
2
50
870
10
50
1562
7
50
999
0
50
1594
6
50
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Keyword(s): 数学