Datasets:

slayone
/

uva_spoj_raw

/*
****************************************************************
****************************************************************
-> Coded by Stavros Chryselis				   
-> Visit my github for more solved problems over multiple sites 
-> https://github.com/StavrosChryselis			  
-> Feel free to email me at stavrikios@gmail.com	
****************************************************************
****************************************************************
*/

#include <iostream>
#include <cstring>

#define ll long long
#define MAXN 10000007
using namespace std;

const ll MOD = 1000000007;
ll memo[MAXN];

ll derangement(ll num)
{
	if (num <= 1)
		return 0;

	if (num == 2)
		return 1LL;

	if (memo[num])
		return memo[num];

	ll temp = derangement(num - 1) + derangement(num - 2);

	temp %= MOD;

	memo[num] = (num - 1) * temp;
	memo[num] %= MOD;

	return memo[num];
}

int main()
{
//	freopen("input.txt", "r", stdin);
	ios::sync_with_stdio(0);

	int T, N;

	cin >> T;

	while (T--)
	{
		cin >> N;
		cout << derangement(N) << "\n";
	}

	return 0;
}

	/*
	****************************************************************
	****************************************************************
	-> Coded by Stavros Chryselis
	-> Visit my github for more solved problems over multiple sites
	-> https://github.com/StavrosChryselis
	-> Feel free to email me at stavrikios@gmail.com
	****************************************************************
	****************************************************************
	*/

	#include <iostream>
	#include <cstring>

	#define ll long long
	#define MAXN 10000007
	using namespace std;

	const ll MOD = 1000000007;
	ll memo[MAXN];

	ll derangement(ll num)
	{
	if (num <= 1)
	return 0;

	if (num == 2)
	return 1LL;

	if (memo[num])
	return memo[num];

	ll temp = derangement(num - 1) + derangement(num - 2);

	temp %= MOD;

	memo[num] = (num - 1) * temp;
	memo[num] %= MOD;

	return memo[num];
	}

	int main()
	{
	// freopen("input.txt", "r", stdin);
	ios::sync_with_stdio(0);

	int T, N;

	cin >> T;

	while (T--)
	{
	cin >> N;
	cout << derangement(N) << "\n";
	}

	return 0;
	}