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duanyq

yongqiang duan, China
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  • Last visit: 3 weeks ago
  • Registered: 15 months ago
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132 problems
solved for all time
132 problems
solved for the last year
4 problems
solved for the last month
8 days
in a row max.
8 days
in a row for the last year
1 day
in a row for the last month