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토이/메일주소셀렉터


text ( a@b.com, b@c.net,..) 환하 text .

  • I/O
. .
  : 
   abc 
   de
  : 
   a b c d e




>>> a@b.net
true
>>> ab.com
false
>>> a@bb
false
>>> aa@bb.co.kr
true
>>> aa@bb.co.co.kr
false


java //
. . .
. . .
. . .

//
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