987
2
49
1043
2
48
209
0
48
1346
4
48
863
0
48
10183
7
48
868
0
48
1069
3
47
594
0
47
1573
6
47
1308
2
47
914
0
47
1212
0
47
1263
0
47
1727
0
47
470
3
47
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Keyword(s): 数学 問題