#include <fstream.h>

ifstream fin("cifra.in");
ofstream fout("cifra.out");

int main()
{

	int t, n, s=0;

	fin>>t;

	for (i=1; i<=t; i++)
	{
	  fin>>n;

	  s = s+n;

	  fout<<s%10<<"\n";
	}

   fin.close();
   fout.close();
   return 0;
}