:
n
:
n
() 10 n
() (
)
(10)
n=1 () (10)
n=2(10)
(n) (10)
:
(n) ( 1 ) ( 1 )
( n ) ( 7 ) ( 7 )
( n ) ( 7 ) ( 28 )
( n )
( n )
: 1 (0 1 )
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