using System; using System.IO; using System.Linq; using System.Collections; using System.Collections.Generic; using System.Numerics; using System.Diagnostics; using System.Text; using System.Text.RegularExpressions; using System.Threading.Tasks; using static System.Math; using MethodImplOptions = System.Runtime.CompilerServices.MethodImplOptions; using MethodImplAttribute = System.Runtime.CompilerServices.MethodImplAttribute; static class P { static void Main() { var abc = Console.ReadLine().Split().Select(int.Parse).ToArray(); var a = abc[0]; var b = abc[1]; var c = abc[2]; for (int price = 1; price <= a + b * 10; price++) { for (int aCount = 0; aCount <= a; aCount++) { for (int bCount = 0; bCount <= b; bCount++) { var pay = aCount + bCount * 10; if (pay < price) continue; var diff = price - pay; var backCount = diff / 10 + diff % 10; if ((a - aCount) + (b - bCount) + backCount == c) { Console.WriteLine(price); return; } } } } Console.WriteLine("Impossible"); } }