No Error Streak II
250 XP
Make no error for 20 problems.
20/20
Common
Recently completed by
Ar1gin 9k, 
T 9k, 
Маргарита Кулигина 11k, 
Anukoon K. 12k, 
chih hong chu 10k, 
Garrett Krawczyk 9k, 
Baylib404 9k
and 9359 others.
