using System;
using System.Linq;
using System.Text;
using System.Collections.Generic;

public class Program
{
    public void Proc() {
        Reader.IsDebug = false;
        int inputCount = int.Parse(Reader.ReadLine());
        StringBuilder ans = new StringBuilder();
        for(int i=0; i<inputCount;i++) {
            int[] arr = Reader.ReadLine().Select(a=>int.Parse(a.ToString())).ToArray();
            while(arr.Length > 1) {
                int[] tmp = new int[arr.Length-1];
                for(int j=0; j<tmp.Length; j++) {
                    int num = arr[j] + arr[j+1];
                    tmp[j] = (num / 10)+(num%10);
                }
                arr = tmp;
            }
            ans.AppendLine(arr[0].ToString());
        }
        Console.Write(ans.ToString());

    }


    public class Reader {
        public static bool IsDebug = true;
        private static System.IO.StringReader SReader;
        private static string InitText = @"



10
3735193991
6406080286
5191117191
9096163630
2612780068
3850187272
6329054969
8747630709
5278943458
4022606808



";
        public static string ReadLine() {
            if(IsDebug) {
                if(SReader == null) {
                    SReader = new System.IO.StringReader(InitText.Trim());
                }
                return SReader.ReadLine();
            } else {
                return Console.ReadLine();
            }
        }

    }
    public static void Main(string[] args)
    {
        Program prg = new Program();
        prg.Proc();
    }
}