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:
() = 250
= 1/2
=1 . .
= 1
= 1/2 .
= 4
= 1
= 400
= 10
:
, . . , , 1 ..
1/2 2 . . , . , , . 2 . 25 .
, , 2 , . 2 . .
, , .
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