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R Ulan's achievement

Speed I

Finish a collection of 11k or lower with an avg. time of under 15 seconds.*

Uncommon

*The collection must contain at least 100 problems.

Recently completed by

Nicolas MV 11k,

robin.kovarex 10k,

Dimensional 5k,

Brad Snyder 21k,

Garrett Krawczyk 9k,

Xavier Richard 2k,

Ben Anderson 6k,

and 2024 others.