1.2-4

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigDecimal ax = BigDecimal.valueOf(sc.nextDouble());
        BigDecimal ay = BigDecimal.valueOf(sc.nextDouble());
        BigDecimal bx = BigDecimal.valueOf(sc.nextDouble());
        BigDecimal by = BigDecimal.valueOf(sc.nextDouble());
        ax.multiply(by).setScale(6, RoundingMode.HALF_UP)
        if (!ay.multiply(bx).setScale(6, RoundingMode.HALF_UP).equals(ax.multiply(by).setScale(6, RoundingMode.HALF_UP))){
            System.out.println(0);
        }
        else{
            if (ay.multiply(by).compareTo(BigDecimal.valueOf(0))<0 || ax.multiply(bx).compareTo(BigDecimal.valueOf(0))<0 ){
                System.out.println(-1);
            }
            else{
                System.out.println(1);
            }
        }
    }
}