12
 1378
 51202278
 989898989
 4
 7
 9
 6
 8
 12193721
 999999995
 999999999
 11
 999999996
 999999998
 3
 14
 15
 10
 999999994
 1000
 13781378
 5
 999999997
 1000000000
 13
 16
 0

6
 4
 4
 8
 6
 2
 8
 4
 6
 8
 2
 2
 2
 6
 4
 2
 4
 2
 4
 4
 6
 4
 8
 8
 6
 8
 6
 1

#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b, c, d, f, g, i, s = 0, n, q, m = 1378;
  cin >> n;
  for (i = 1; i <= n; i++) {
    s += m * 1378;
  }
  cout << fixed << setprecision(0) << s % 10 << endl;
  return 0;
}
