480
0
17
541
3
17
376
0
17
304
2
16
331
2
16
263
0
16
253
0
16
354
0
16
374
2
16
253
2
16
1109
3
16
623
7
16
552
8
16
422
0
16
413
2
16
1067
4
16
451
0
16
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Keyword(s): 数学 問題