21A - Jabber ID - CodeForces Solution


implementation strings *1900

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Python Code:

import re
string = input( )
pattern = re.compile("^\w{1,16}@(\w{1,16}\.)*\w{1,16}(|/\w{1,16})$")
if pattern.match( string ) :
    print( "YES" )
else :
    print( "NO" )


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