Achievement: Speed IX

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Speed IX

Finish a collection between 7k and 5k with an avg. time of under 10 seconds.*

*The collection must contain at least 100 problems.

Recently completed by

jonathan lardillier 3k, TemirNiazbekov 1k, Wilczasty 3k, imtqoi 4k, Patrick361 3k, AK-33 6d, ecdave 2k, Александра 7k, Алёна Киреева 8k, Neri 1k

and 102 others.