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RGB8009 - Хуваагчдын нийлбэр

 N тоо өгөгдөв. 1-ээс N тоо хүртэлх тоонуудаас хуваагчдынх нь нийлбэр хамгийн их тоог ол. / Хуваагчид 1 болон N тоо өөрөө орно./ Хэрвээ тийм хэд хэд байгаа бол сүүлийн тоог нь гарга. 

Input

N тоо өгөгдөнө. / Integer төрөл /

Output

Хуваагчдын нийлбэр нь хамгийн их тоо.

Example

Input:
5

Output:
4

Нэмсэн:Bataa
Огноо:2010-01-05
Хугацааны хязгаарлалт:0.100s
Эх кодын хэмжээний хязгаарлалт:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Програмчлалын хэлүүд:ADA95 ASM32 ASM64 BASH BF C CSHARP C++ 4.3.2 CPP CPP14 C99 CLPS LISP sbcl LISP clisp D ERL FORTRAN HASK ICON ICK JAVA JS-RHINO LUA NEM NICE OCAML PAS-GPC PAS-FPC PERL PHP PIKE PRLG-swi PYTHON RUBY SCALA SCM guile SCM qobi ST TCL TEXT WHITESPACE

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2013-03-19 06:43:33 temuulen
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Last edit: 2014-03-24 02:55:49
2013-01-18 04:33:26 lds


Last edit: 2013-01-18 04:34:38
2012-11-01 06:06:39 Tugsjargal
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2012-03-06 05:41:11 Lhagva-ochir

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2012-03-06 05:40:25 Lhagva-ochir
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2010-08-17 13:58:36 Cyber MN /Enkhtulga/
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2010-08-03 04:39:58 CS09D006
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2010-06-04 04:10:16 CS09D006
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2010-05-08 14:56:42 George_teller
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2010-03-21 08:20:32 ByambadorjP
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