# i n c l u d e   < c o n i o . h > 
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 # i n c l u d e   < s t d i o . h > 
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 # i n c l u d e   < s t r i n g . h >     / / t h   v i n   c h u i 
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 i n t   m a i n ( ) 
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 { 
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         c h a r   x a u [ 3 0 ] ; 
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         g e t s ( x a u ) ; 
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         f o r ( i n t   i = s t r l e n ( x a u ) - 1 ; i > = 0 ; i - - )     / / s t r l e n   t r   v     d  i   c a   c h u i 
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         { 
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                 p r i n t f ( " % c " , x a u [ i ] ) ; 
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         } 
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         g e t c h ( ) ; 
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 } 
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