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RGB7215 - Үржвэр нийлбэр 3

1*2+3*4+5*6+...+(n-1)*n нийлбэрийг ол.

Input

Натурал тэгш тоо өгөгдөнө.

Output

Нийлбэр.

Example

Input:
6

Output:
44

Нэмсэн:Bataa
Огноо:2013-01-21
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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2022-10-13 04:53:03
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2022-10-03 05:57:58


Last edit: 2022-10-03 06:08:51
2022-09-22 07:22:23
Scanner scan = new Scanner (System.in);
System.out.print("A=");
int nu1 = scan.nextInt();
int al = 0;
for(int a=2;a<=nu1;a+=2)
{
al+=a*(a-1);
}
System.out.print(al);
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