import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Введите минимум: ");
        int min = scanner.nextInt();

        System.out.print("Введите максмум: ");
        int max = scanner.nextInt();

        main: while(true) {
        	int avr = (int) Math.ceil((max - min) / 2f + min);

        	System.out.append("Число больше или равно ");
        	System.out.append(Integer.toString(avr));
        	System.out.print(" (+/-/=): ");

        	String condition = scanner.next();

        	switch(condition) {
	        	case "+":
	        		min = avr;
	        		break;
	        	case "-":
	        		max = avr;
	        		break;
	        	case "=":
	        		System.out.append("Загаданное число ");
				System.out.println(avr);
	        		break main;
        	}
        }

        scanner.close();
    }
}