478
0
7
516
0
7
568
0
7
534
1
6
885
0
6
959
0
5
376
2
5
624
0
5
430
0
5
565
0
5
248
0
5
405
0
5
479
0
5
313
1
4
515
0
4
258
0
4
457
1
3
578
1
3
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Keyword(s): 代数