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

Valid Username Regular Expression

Hacker
Rank
Score
laid_to_rest
158076
flag of India
00.00
bil_070
158076
flag of Pakistan
00.00
dotaboy
158076
flag of Philippines
00.00
adit_nitd
158076
flag of India
00.00
hawvva
158076
flag of India
00.00
Piyush2512
158076
flag of India
00.00
sindhushat
158076
flag of India
00.00
ashu_dwy
158076
flag of India
00.00
shah_parshva96
158076
flag of India
00.00
l3ond
158076
flag of Moldova, Republic of
00.00
jpk244
158076
flag of United States
00.00
aawste
158076
flag of United States
00.00
i_apoorva
158076
flag of India
00.00
ivmos
158076
flag of Spain
00.00
jyotman
158076
flag of India
00.00

[deleted]

158076
flag of null
00.00
MakeSomething
158076
flag of India
00.00
hanshushounak11
158076
flag of India
00.00
rajanW
158076
flag of India
00.00
vignannani
158076
flag of United States
00.00
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