Дудка какая-то

Main.java

package src;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.Scanner;

class Main{
    public static void main(String argv[]) throws FileNotFoundException {
        Scanner sc;
        PrintWriter pw = null;
        sc = new Scanner("input.txt");
        pw = new PrintWriter("output.txt");
        /*sc = new Scanner(System.in);
        pw = new PrintWriter(System.out);*/
        BigInteger a, b, rc;
        a = sc.nextBigInteger();
        b = sc.nextBigInteger();
        rc = sc.nextBigInteger();
        System.out.println(a.max(b.max(rc)));
        sc.close();
        pw.close();
    }
    Main(){}
}

WTF
Runtime 1!