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RGB7213 - Үржвэр нийлбэр 1

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

Input

Натурал тоо өгөгдөнө.

Output

Нийлбэр

Example

Input:
5

Output:
70

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 04:31:26
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2022-10-13 04:31:25
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2022-10-13 04:31:25
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2022-10-13 04:31:12
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2022-10-03 05:58:13


Last edit: 2022-10-03 05:59:42
2022-10-03 05:57:51
nomio bitgii huulaldaaa
2022-09-26 11:36:24
enii hariu miniii TARHIND baina
bodoj cadahgui baiwal enciniii uusan ARHIND baina
ennig boddog bolhin tuld hiceelee DAWTAJ bai
cadahgui baijeej arhi utsand buu AWTAJ bai

2022-09-14 05:56:58
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main() {
int a,b=0,c=0,d,i;
scanf("%d",&a);
for(i=1;i<=a;i++){
b=b+i*(i+1); }
printf("%d",b);
return 0;
}
Monhnasan
2022-09-14 05:46:44
2022-09-14 05:43:49 (edit)
enii hariu miniii TARHIND baina
bodoj cadahgui baiwal enciniii uusan ARHIND baina
ennig boddog bolhin tuld hiceelee DAWTAJ bai
cadahgui baijeej arhi utsand buu AWTAJ bai

#include <iostream>
using namespace std;

int main(){
long n,s=1,i;
cin>>n;
cout<<(n*(n+1))/2+(n*(n+1)*(2*n+1))/6;
return 0;
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