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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("cifra.in");
ofstream g("cifra.out");
int main()
{
int x[10];
x[0]=0;
x[1]=1;
x[2]=4;
x[3]=7;
x[4]=6;
x[5]=5;
x[6]=6;
x[7]=3;
x[8]=2;
x[9]=9;
int n,y,s=0;
f>>n;
for(int i=1;i<=n;i++)
{
f>>y;
for(int i=1;i<=y;i++)
{
s+=x[i%10];
s=s%10;
}
g<<s<<endl;
s=0;
}
return 0;
}