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answerend42

Yangguang Sun, Wuhan, China
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  • Last visit: 34 hours ago
  • Registered: 5 years ago
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203 problems
solved for all time
109 problems
solved for the last year
5 problems
solved for the last month
7 days
in a row max.
7 days
in a row for the last year
2 days
in a row for the last month