Solve a problem for the first time
Awarded to 图图 胡 on 09 Sep 2021
Solve all the problems in Computation Geometry I
Awarded to 图图 胡 on 24 Sep 2021
Solve all the problems in CUP Challenge
Awarded to 图图 胡 on 19 Oct 2021
Solve a community group
Awarded to 图图 胡 on 10 Sep 2021
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