using static System.Math;
public static void Main(string[] args) {
string entrada = Console.ReadLine();
string[] values1 = entrada.Split(' ');
double A = double.Parse(values1[0]);
double B = double.Parse(values1[1]);
double C = double.Parse(values1[2]);
Double maiorAB = (A+B+Abs(A-B))/2;
Double maiorABC = (maiorAB+C+Abs(maiorAB-C))/2;
Console.WriteLine(maiorABC + " eh o maior");