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#include <iostream>
#include <fstream>
#include <cstring>
#include <string>
#include <cstdlib>
using namespace std;
int d[135];
char n[110];
char q[4];
int main()
{
ifstream f("cifra.in");
ofstream g("cifra.out");
int t;
f >> t;
d[1]=1;
d[2]=5;
for(int i=1;i<=100;++i)
{
int x=1;
for(int j=1;j<=i;++j)
{
x=x*i;
x=x%10;
}
d[i]=d[i-1]%10+x;
d[i]=d[i]%10;
}
for(int i=1;i<=t;++i)
{
f >> n;
if(strlen(n)>1)
{
strcpy(q,n+strlen(n)-2);
}
else
{
strcpy(q,n);
}
int x=atoi(q);
g << d[x] <<" ";
}
return 0;
}