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

Valid Username Regular Expression

Hacker
Rank
Score
amirfarah
01
flag of Israel
20.00
adarshagrawal38
01
flag of India
20.00
lw2645
01
flag of United States
20.00
vvk_gaurav
01
flag of India
20.00
rainboy
01
flag of United States
20.00
Dukkha
01
flag of United States
20.00
augten95
01
flag of United States
20.00
surajvikash
01
flag of India
20.00
meet_lovelyac
01
flag of India
20.00
knkbnl26035
01
flag of India
20.00
nesscripter
01
flag of United Kingdom
20.00
tbru2
01
flag of United States
20.00
stewartpatrick12
01
flag of United States
20.00
ewoknock
01
flag of United States
20.00
Tanvi13
01
flag of Canada
20.00
kosikhar
01
flag of Canada
20.00
imfaridz
01
flag of Indonesia
20.00
kammu
01
flag of India
20.00
markfan
01
flag of United States
20.00
yaswannth
01
flag of United States
20.00
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