666
0
20
712
0
14
291
0
12
452
0
11
472
0
11
1206
0
10
708
0
8
374
0
8
456
0
8
476
0
7
365
0
7
426
0
7
338
2
7
333
0
7
888
0
7
363
0
7
436
0
7
509
0
7
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Keyword(s): 代数