#include "bits/stdc++.h"
using namespace std;
#define fastcin {\
    cin.tie(0);\
    ios::sync_with_stdio(false);\
}
#define rep(i, a, b) for(int i = a; i < b; i++)
#define rrep(i, a, b) for(int i = a; i >= b; i--)
#define fore(i, a) for(auto &i:a)
#define print(x) cout << x << "\n"
#define SORT(a, n) sort(a, a+n);
#define REVERSE(a,n) reverse(a,a+n);
#define VSORT(v) sort(v.begin(), v.end());
#define VREVERSE(v) reverse(v.begin(), v.end());
#define MOD 1000000007
#define yes "YES"
#define no "NO"
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vll;


int main() {
    fastcin;
    int t;
    cin >> t;
    string s, sd = "";
    rep(i, 0, t) {
        cin >> s;
        while(s.size()!=1) {
            int r = s.size()-1;
            sd = "";
            rep(j, 0, r) {
                int a = s[j]-'0'+s[j+1]-'0';
                int b = a/10 + a%10;
                sd = sd + to_string(b);
            }
            s = sd;
        }
        print(s);
    }
    return 0;
}