using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            var m = NN;
            var d = NList;
            var s = new List<char>();
            for (var i = 0; i < d.Length; ++i) for (var j = 0; j < d[i]; ++j) s.Add((char)('1' + i));
            if (s.Count == 0) s.Add('1');
            var tmp = long.Parse($"{string.Concat(s)}000000000");
            ans[u] = tmp + (m - tmp % m) % m;
        }
        WriteLine(string.Join("\n", ans));
    }
}