#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

int func( string S ) {
    vector<int> A;
    int n = S.length();
    for ( int i = 0; i < n; i++ ) {
        A.push_back(S[i]-'0');
    }
    while ( n > 1 ) {
        for ( int i = 0; i < n-1; i++ ) {
            A[i] += A[i+1];
            A[i] = A[i]%10 + A[i]/10;
        }
        n--;
    }
    return A[0];
}

int main() {
    int T;
    cin >> T;
    string S;
    vector<int> A(T);
    for ( int i = 0; i < T; i++ ) {
        cin >> S;
        A[i] = func(S);
    }
    for ( int i = 0; i < T; i++ ) {
        cout << A[i] << endl;
    }
    return 0;
}