using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;
using static System.Convert;
using static System.Math;
//using Debug;
//using static System.Globalization.CultureInfo;
using System.Text;
class Program
{
    static void Main(string[] args)
    {
        Solve();
        //WriteLine(Solve());
    }
    static void Solve()
    {
        var abc = Input.ar;
        var val = abc[0] + 10 * abc[1];
        var e = new List<Pair<int, int, int>>() { new Pair<int, int, int>(0, 0, 0) };
        for (var i = 0; i < abc[0]; i++)
            e.Add(new Pair<int, int, int>(i+1,i+1,0));var c = e.Count;
        for (var i = 0; i < c; i++)
            for (var j = 0; j < abc[1]; j++)
                e.Add(new Pair<int, int, int>(e[i].v1 + 10 * (j + 1), e[i].v2, j + 1));
        var v = e.Where(a => a.v2/10 + a.v3+a.v2%10 == abc[2] && a.v1 != val).Select(a => val - a.v1).OrderBy(a => a).FirstOrDefault();
        if (v == 0)
            WriteLine("Impossible");
        else WriteLine(v);
    }
}

public class Input
{
    public static string read => ReadLine();
    public  static int[] ar => Array.ConvertAll(read.Split(' '), int.Parse);
    public  static int num => ToInt32(read);
    public static long[] arL => Array.ConvertAll(read.Split(' '), long.Parse);
    public  static long numL => ToInt64(read);
    public static char[][] gred(int h) 
        => Enumerable.Repeat(0, h).Select(v => read.ToCharArray()).ToArray();
    public static int[][] ar2D(int num)
        => Enumerable.Repeat(0, num).Select(_ => ar).ToArray();
    public static long[][] arL2D(int num)
        => Enumerable.Repeat(0, num).Select(_ => arL).ToArray();
    public static T getValue<T>(string g)
    {
        var t = typeof(T);
        if (t == typeof(int))
            return (T)(object)int.Parse(g);
        if (t == typeof(long))
            return (T)(object)long.Parse(g);
        if (t == typeof(string))
            return (T)(object)g;
        if (t == typeof(char))
            return (T)(object)char.Parse(g);
        if (t == typeof(double))
            return (T)(object)double.Parse(g);
        if (t == typeof(bool))
            return (T)(object)bool.Parse(g);
        return default(T);
    }
    public const long Inf = (long)1e18;
    public const double eps = 1e-6;
    public  const string alfa = "abcdefghijklmnopqrstuvwxyz";
    public  const int MOD = 1000000007;
}
public class Pair<T1, T2> : IComparable<Pair<T1, T2>>
{
    public T1 v1 { get; set; }
    public T2 v2 { get; set; }
    public Pair() : this(default(T1), default(T2)) { }
    public Pair(T1 v1, T2 v2)
        => SetValue(v1, v2);

    public int CompareTo(Pair<T1, T2> p)
    {
        var c = Comparer<T1>.Default.Compare(v1, p.v1);
        if (c == 0)
            c = Comparer<T2>.Default.Compare(v2, p.v2);
        return c;
    }
    public void SetValue(T1 v1,T2 v2) { this.v1 = v1;this.v2 = v2; }
    public static Pair<T1, T2> makePair()
    {
        var r = ReadLine().Split(' ');
        return new Pair<T1, T2>(Input.getValue<T1>(r[0]), Input.getValue<T2>(r[1]));
    }
    public override string ToString()
        => $"{v1.ToString()} {v2.ToString()}";
}

public class Pair<T1, T2, T3> : Pair<T1, T2>, IComparable<Pair<T1, T2, T3>>
{
    public T3 v3 { get; set; }
    public Pair() : base() => v3 = default(T3); 
    public Pair(T1 v1,T2 v2,T3 v3):base()
        => SetValue(v1, v2, v3);
    
    public int CompareTo(Pair<T1, T2, T3> p)
    {
        var c = base.CompareTo(p);
        if (c == 0)
            c = Comparer<T3>.Default.Compare(v3, p.v3);
        return c;
    }
    public void SetValue(T1 v1, T2 v2, T3 v3)
    {
        base.SetValue(v1, v2);
        this.v3 = v3;
    }
    public new static Pair<T1, T2, T3> makePair()
    {
        var r = ReadLine().Split(' ');
        return new Pair<T1, T2, T3>(Input.getValue<T1>(r[0]), Input.getValue<T2>(r[1]), Input.getValue<T3>(r[2]));
    }
    public override string ToString()
        => $"{base.ToString()} {v3.ToString()}";
}