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RGB7216 - Үржвэр нийлбэр 4

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

Input

Натурал тоо өгөгдөнө.

Output

Нийлбэр.

Example

Input:
4

Output:
210

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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2022-10-14 04:12:07
enhod suga
2022-10-14 04:12:07
enhod suga
2022-10-14 04:12:07
enhod suga
2022-10-14 04:12:07
enhod suga
2022-10-14 04:12:07
enhod suga
2022-10-14 04:11:41
#include<bits/stdc++.h>
using namespace std;
int main () {
int n,i,s;
cin>>n;
s=0;
for(i=1;i<=n;i=i+2){
s=s+i*(i+1);
}
cout<<s<<endl;
}
2022-10-14 04:10:54
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