# my $t = <>;
my $t = 1;
if($t == 0) {
    exit;
}
while ($t--) {
    my ($a, $b, $c) = split(/ /, <>);
    if($a == 0) {
        if($b == 0){
            if($c == 0){
                print "3\n";
            } else {
                print "0\n";
            }
        } else {
            printf "%.12f\n", -$c/$b;
        }
    } else {
        my $d = $b * $b - 4 * $a * $c;
        if($d > 0){
            # print "2 ";
            my $s = sqrt($d);
            if($a > 0){
                printf "%.12f ", (-$b-$s)/(2*$a);
                printf "%.12f \n", (-$b+$s)/(2*$a);
            } else {
                printf "%.12f ", (-$b+$s)/(2*$a);
                printf "%.12f\n", (-$b-$s)/(2*$a);
            }
        } elsif($d == 0){
            # print "1 ";
            printf "%.12f\n", -$b/(2*$a);
        } else {
            print "imaginary\n"
        }
    }
}