168
0
3
231
0
3
561
0
3
374
0
3
162
0
3
260
0
3
312
0
3
314
0
3
454
0
2
177
0
2
233
0
2
444
0
2
262
0
2
239
0
2
210
0
2
191
0
2
237
0
2
228
0
1
152
0
1
424
0
1
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Keyword(s): 数学c