/*
cifra infoarena
*/
#include<vector>
#include<string>
#include<string.h>
#include<algorithm>
#include<cstdio>
#include<fstream>
#include<iostream>
#include<ctime>
#include<set>
#include<map>
#include<cmath>

using namespace std;

#define LL long long
#define PII pair<int ,int>
#define PCI pair<char ,int>
#define VB vector <bool>
#define VI vector <int>
#define VC vector <char>
#define WI vector<VI>
#define WC vector<VC>
#define RS resize
#define X first
#define Y second

#define FORN(i,n) for(int i=0;i<n;++i)
#define FOR(i,a,b) for(int i=a;i<=b;++i)
#define FORD(i,a,b) for(int i=a;i>=b;--i)
#define REPEAT do
#define UNTIL(x) while((x))

#define IN_FILE "cifra.in"
#define OUT_FILE "cifra.out"
ifstream f(IN_FILE);
ofstream g(OUT_FILE);

//variables
int t, n,maxi;
VI x,y;
//other functions
int calculare_n()
{
	int cifra = 1;
	FOR(i, 2, n)
	{
		int putere = i % 10;
		if (putere > 0)
		{
			cifra += (int)pow(i,putere) % 10;
		}
	}
	cifra %= 10;
	return cifra;
}
void reading()
{
	f >> t;
	y.RS(t);
	FORN(i, t)
	{
		f >> y[i];
		maxi = max(y[i],maxi);
	}
	f.close();
}
void solving()
{
}
void write_data()
{
	FORN(j, t)
	{
		int cifra = 1;
		FOR(i, 2,y[j])
		{
			int putere = i % 10;
			if (putere == 0)
			{
				//
			}
			else
			{
				cifra += (int)pow(i, putere);
				cifra %= 10;
			}
		}
		g << cifra << "\n";
	}
}
int main()
{
	reading();
	solving();
	write_data();
}