/* percabangan Bersarang */

/* Percabangan Bersarang */
#include <stdio.h>
int main() {
    int x, y;
    scanf ("%d %d", &x, &y) ;
    if (y!=0)
        if (x/y>20)
        printf ("1\n") ;
    else
        printf ("-1\n") ;
return 0;
}