import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class Homotetie {
    public static void main(String[] args) {
        try {
            FileInputStream fi = new FileInputStream("polygone.bin");
            DataInputStream dis = new DataInputStream(fi);
            FileOutputStream fo = new FileOutputStream("polygonex2.bin");
            DataOutputStream dos = new DataOutputStream(fo);

            int n = dis.available() / 8;
            for (int i = 0; i < n; i++) {
                dos.writeInt(dis.readInt() * 2);
            }

            dis.close();
            dos.close();
        } catch (Exception e) {

        }
    }
}