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RGB7205 - n!

n! ол.

Input

Int төрлийн бүхэл тоо өгөгдөнө.

Output

Өгөгдсөн тооны факториал.

Example

Input:
5

Output:
120

Нэмсэн:Bataa
Огноо:2011-06-12
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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2018-10-01 03:32:28
#include <iostream>
using namespace std;

int main() {
int a,b = 1;
cin >> a;
while (a>0){
b=b*a;
a--;
}
cout<<b;
}
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