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  1. Prepare
  2. Java
  3. Strings
  4. Valid Username Regular Expression
  5. Leaderboard

Valid Username Regular Expression

Hacker
Rank
Score
empyrosx
01
flag of Russia
20.00
addazi_lorenzo
01
flag of Italy
20.00
birigy
01
flag of Morocco
20.00
deafbunn3
01
flag of United States
20.00
androidani
01
flag of India
20.00
gilangmlr
01
flag of Singapore
20.00
twonibbles
01
flag of Germany
20.00
Deditated_Lambo
01
flag of United States
20.00
TheFuriousGent
01
flag of United States
20.00
jrgreen
01
flag of United Kingdom
20.00
htimlin4238
01
flag of United States
20.00
mantaoli
01
flag of United States
20.00
jacobtschoepe
01
flag of United States
20.00
arucker0737
01
flag of United States
20.00
jdubois7495
01
flag of United States
20.00
camcad
01
flag of United States
20.00
lwhitworth5304
01
flag of United States
20.00
await13
01
flag of United States
20.00
MuffinLord
01
flag of United States
20.00
Rperez26
01
flag of United States
20.00
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