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RGB7234 - Косинус

cos(1+cos(2+...+cos((n-1)+cos(n))...) илэрхийллийг бод.

Input

Натурал тоо өгөгдөнө.

Output

Илэрхийллийн утга. Таслалаас хойш 3 оронгийн нарийвчлалтайгаар гарга.

Example

Input:
3

Output:
0.039

Нэмсэн:Bataa
Огноо:2013-01-23
Хугацааны хязгаарлалт:1s
Эх кодын хэмжээний хязгаарлалт:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Програмчлалын хэлүүд:ADA95 ASM32 BASH BF C NCSHARP CSHARP C++ 4.3.2 CPP C99 CLPS LISP sbcl LISP clisp D ERL FORTRAN HASK ICON ICK JAVA JS-RHINO JULIA LUA NEM NICE OCAML PAS-GPC PAS-FPC PERL PHP PIKE PRLG-swi PYTHON PYPY3 PYTHON3 RUBY SCALA SCM guile ST TCL WHITESPACE

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2023-05-27 06:43:34
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Chamd l muushude
2023-05-03 05:26:20
chi huurhun shu
2023-03-01 03:37:21
Zorigt mal bol mai shu
2023-03-01 03:36:26
Tsogt-erdene mal hezeech bodoj chadahgu
2023-03-01 03:35:22
Dolgion mal sda
2022-12-02 02:18:19
huuljl bainu
2022-10-16 07:05:34



































































































huulha boli

















































boliocheee





















































































































































ireeduid chini muu da
2022-10-16 07:05:29



































































































huulha boli

















































boliocheee





















































































































































ireeduid chini muu da
2022-10-16 07:05:13



































































































huulha boli

















































boliocheee





















































































































































ireeduid chini muu da
2022-01-23 13:13:54
#include<bits/stdc++.h>
using namespace std;
float a,b,c,d,e;
int main()
{
scanf("%f",&a);
b=a;
c=a;
while(a>=1)
{
c=(a-1)+cos(c);
a--;
}
printf("%.3f",c);
return 0;
}

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