947
2
52
736
0
52
1065
0
52
955
0
52
803
0
52
599
0
51
1259
3
51
925
15
51
754
0
51
1333
0
51
605
1
51
593
2
51
829
1
50
1798
2
50
852
0
50
1607
0
50
717
0
50
1158
0
50
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Keyword(s): 数学