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ProblemID
Title
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2016-04-30 19:11:03
1001
可不可以只有4或者只有7
mpxsuyzmk3007
1
2016-04-30 18:59:27
1001
bcfinal？
w470561734
0
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1001 - ztr loves lucky numbers
1002 - ztr loves substring
1003 - ztr loves trees
1004 - ztr loves chess
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