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#include <iostream>
#include <fstream>
#include <math.h>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int T, i, v[50000],nr,put,k, a;
int main()
{
f>>T;
v[1]=1;
for (i=2;i<=20;i++)
{
nr=i%10;
if (i%4!=0)
put=i%4;
else
put=4;
k=pow((double)nr,(double)put);
v[i]=(v[i-1]+k)%10;
nr=0; put=0; k=0;
}
for (i=1;i<=T;i++)
{
f>>a;
if (a%20!=0)
a=a%20;
else a=20;
g<<v[a]<<endl;
a=0;
}
return 0;
}