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#include <iostream>
#include<fstream>
using namespace std;
int n,v[100],t;
int main()
{
ifstream in("cifra.in");
ofstream out("cifra.out");
in>>t;
for(int i=0; i<t; i++)
{
in>>v[i];
}
for(int j=0; j<t; j++)
{
int x=v[j]%20;
int sum=94*(v[j]/20);
if(x==1) sum+=1;
if(x==2) sum+=5;
if(x==3) sum+=12;
if(x==4) sum+=18;
if(x==5) sum+=23;
if(x==6) sum+=29;
if(x==7) sum+=32;
if(x==8) sum+=38;
if(x==9) sum+=47;
if(x==10) sum+=47;
if(x==11) sum+=48;
if(x==12) sum+=54;
if(x==13) sum+=57;
if(x==14) sum+=63;
if(x==15) sum+=68;
if(x==16) sum+=74;
if(x==17) sum+=81;
if(x==18) sum+=85;
if(x==19) sum+=94;
out<<sum%10<<"\n";
}
}