900
0
60
1284
0
60
1245
2
60
1527
21
60
1080
0
60
2172
11
59
860
5
59
1606
0
59
1620
2
59
7459
3
59
1509
14
59
680
2
59
2442
1
59
5377
3
59
1437
2
59
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Keyword(s): 数学