5656
0
73
742
7
72
1537
0
72
1783
2
72
2052
0
72
3756
1
72
1804
4
72
3452
8
72
827
3
72
1891
3
72
18476
5
71
2385
0
71
1158
2
71
561
2
71
3109
13
71
1488
0
71
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Keyword(s): 数学