Problem hidden
This problem was hidden by Editorial Board member probably because it has incorrect language version or invalid test data, or description of the problem is not clear.
Submit All submissions Best solutions PDF Back to list

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
Submit solution!
Added by:Bataa
Date:2013-01-21
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:NCSHARP C++ 4.3.2 CPP CPP14 JULIA PYPY3
© Spoj.com. All Rights Reserved. Spoj uses Sphere Engine™ © by Sphere Research Labs.