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RGB7609 - Зальжин дараалал

a0=1, a1=1, a2n = an ­+ 1 (n>0), a2n+2 = a2n+1 - an (n>0) томьёогоор өгөгдсөн дарааллын n-р гишүүнийг ол.

Input

Натурал тоо n өгөгдөнө. 1<=n<=1000.

Output

Дарааллын n-р гишүүн.

Example

Input:
11

Output:
13

Нэмсэн:Bataa
Огноо:2013-01-24
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

hide comments
2019-10-20 11:28:58
tembyyjin
2019-10-06 09:28:43
#include<cstdio>
#include<cmath>

int main () {
long long a[10000];
int f,n,i,j,m,k;
scanf ("%d",&f);
a[0]=1;
a[1]=1;
for(i=1;i<=f;i=i+1){
a[2*i]=a[i]+1;
a[2*i+1]=a[i+1]+a[i]+1;
}
printf ("%d",a[f]);
return 0;
}
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