public class Program {

    public static int max=Integer.MAX_VALUE/2;
    public static void main(String[] args)throws Exception{

/*        FileReader fr= new FileReader("tp_lab2.txt");
//while(c != -1){}
        int c;
        StringBuffer strBuffer = new StringBuffer();

        c = fr.read();

        while (c != 10){
            strBuffer.append((char)c);
            c = fr.read();
        }
        String str = strBuffer.toString();
        System.out.println(str);
        int s = Integer.parseInt(str);
        System.out.println(s);
        Graph graph = new Graph(s);