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babaykaGo2's achievement

Speed X

Finish a collection of 4k or higher with an avg. time of under 30 seconds.*

Rare

*The collection must contain at least 100 problems.

Recently completed by

Thara Thanasit 2k,

Елена Ефремова 2k,

Ольга Киреева 1k,

and 160 others.