include [HTML_REMOVED]

include [HTML_REMOVED]

include [HTML_REMOVED]

void jiecheng(int a){
int ans=1;
for(int i=1;i<=a;i++){
ans*=i;
}
printf(“%d”,ans);

}
using namespace std;
int main()
{
int n;
cin>>n;
jiecheng(n);
return 0;
} ``