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#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
ifstream f("cifra.in"); ofstream g("cifra.out");
int i,n,cif,a[105]; string b;
int cifra(int x)
{
int c;
if(x==0) c=0;
if(x==1) c=1;
if(x==2) c=4;
if(x==3) c=7;
if(x==4) c=6;
if(x==5) c=5;
if(x==6) c=6;
if(x==7) c=3;
if(x==8) c=6;
if(x==9) c=9;
return c;
}
int main()
{
f>>n;
a[0]=0;
cif=0;
for(i=1;i<=100;i++)
{
a[i]=(a[i-1]+cifra(i%10))%10;
}
for(i=1;i<=n;i++)
{
int nr;
f>>b;
nr=b.length();
nr--;
if (nr==0)
{
g<<a[b[nr]-'0']<<'\n';
}
else
{
g<<a[(b[nr-1]-'0')*10+b[nr]-'0']<<'\n';
}
}
return 0;
}