package pl.codegym.task.task04.task0441;


/*
Jakiś taki przeciętny
*/
import java.io.*;

public class Solution {
    public static void main(String[] args) throws Exception {
        //tutaj wpisz swój kod

        InputStream inputStream = System.in;
        Reader inputStreamReader = new InputStreamReader(inputStream);
        BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

        String as = bufferedReader.readLine();
        String bs = bufferedReader.readLine();
        String cs = bufferedReader.readLine();

        double a = Double.parseDouble(as);
        double b = Double.parseDouble(bs);
        double c = Double.parseDouble(cs);

        System.out.print(middleNum(a, b, c));


    }

    public static double middleNum(double a, double b, double c) {

        if (((a >= b) && (c <= b)) || ((a <= b) && (c >= b))) {
            return b;
        } else {
            if (((b >= a) && (c <= a)) || ((b <= a) && (c >= a)))
                return a;
            else
                return c;

        }
    }
}