#include <fstream>
#include <cstring>
using namespace std;
ifstream cin("cifra.in");
ofstream cout("cifra.out");
int r[105];
int n_la_n(int n)
{
    int s=0;
    for(int i=1;i<=n;i++)
    {
        if(i%4==0)
            s+=i*i*i*i;
        else if(i%4==1)
            s+=i;
        else if(i%4==2)
            s+=i*i;
        else if(i%4==3)
            s+=i*i*i;
    }
    return s;
}
int main()
{
    int t,n,i,x;
    char c,v[105];
    cin>>t;
    for(i=1;i<=100;i++)
        r[i]=n_la_n(i)%10;
    cin.get(c);
    for(i=1;i<=t;i++)
    {
        n=0;
        while(cin.get(c)&&c>='0'&&c<='9')
            v[++n]=c;
        if(n>=2)
            x=(v[n-1]-'0')*10+v[n]-'0';
        else
            x=v[n]-'0';
        cout<<r[x]<<'\n';
    }
    return 0;
}