import java.util.Scanner;

public class Input {

public static int integer() {

Scanner sc = new Scanner(System.in);

while (!sc.hasNextInt()) {

System.out.println("Please input integer");

sc.nextLine();

}

return sc.nextInt();

}

public static int integer(int max) {

Scanner sc = new Scanner(System.in);

int i;

while (true) {

if (sc.hasNextInt()) {

i = sc.nextInt();

if (i >= 0 && i <= max) break;

}

System.out.println("Please input integer in the range 0-" + max);

sc.nextLine();

}

return i;

}

public static String string() {

Scanner sc = new Scanner(System.in);

return sc.nextLine();

}

}