FCTRL2.cpp

#include <iostream>
#include <string>
using namespace std;
 
int main()
{
	int t,n,i,m;
	cin>>t;
	while(t--)
	{
		cin>>n;
		m = n;
		int size = 0 , i = 0, temp = 0, prod;
		int arr [200];
		while(n != 0)
		{
			temp = n % 10;
			arr[i] = temp;
			n /= 10;
			size++, i++;
		}
		temp = 0;
		m -= 1;
		while(m > 0)
		{
			for(i = 0; i < size; i++)
			{
				prod = arr[i] * m + temp;
				arr[i] = prod % 10;
				temp = prod / 10;
			}
			while(temp != 0)
			{
				arr[i] = temp % 10;
				temp /= 10;
				size++, i++;
			}
			m--;
		}
		for (i = size-1; i >= 0; i--)
		{
			cout<<arr[i];
		}
		cout<<endl;
	}
	return 0;
}