Achievement: Speed X

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Speed X

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

*The collection must contain at least 100 problems.

Recently completed by

caranthir 1d, MalikKarimov 6k, mehmeh 11k, Yarosurabu 3k, Thijs 5d, Mrmaaay 1k, Katemior 4k, MiPa15 2d, preme 3k, Tschej 1d

and 131 others.