#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int solve(const string &s) {
  int ret = 0;
  vector<int> a;
  for (char c: s) a.push_back(c - '0');

  while (a.size() > 1) {
    for (int i = 0; i + 1 < a.size(); i++) {
      a[i] += a[i+1];
      if (a[i] > 10) {
        a[i] = a[i] / 10 + a[i] % 10;
      }
    }
    a.pop_back();
  }
  return a[0];
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int T;
  cin >> T;
  while (T--) {
    string s;
    cin >> s;
    cout << solve(s) << endl;
  }
  return 0;
}