private void fix() {
BigInteger gcd = num.gcd(den);
if (gcd.compareTo(BigInteger.ONE) > 0) {
num = num.divide(gcd);
den = den.divide(gcd);
}
if (den.compareTo(BigInteger.ZERO) < 0) {
num = num.negate();
den = den.negate();
}
}
public static void main(String[] args) {
BigInteger a = BigInteger.valueOf(1), // without OO
b = 2, // with OO
c1 = a.negate().add(b.multiply(b)).add(b.divide(a)), // without OO
c2 = -a + b * b + b / a; // with OO
if (c1.compareTo(c2) < 0 || c1.compareTo(c2) > 0)
System.out.println("impossible"); // without OO
if (c1 < c2 || c1 > c2) System.out.println("impossible"); // with OO
HashMap<String, String> map = new HashMap<>();
if (!map.containsKey("qwe")) map.put("qwe", "asd"); // without OO
if (map["qwe"] == null) map["qwe"] = "asd"; // with OO
}
public fraction negate() {
return new fraction(num.negate(), den.add(BigInteger.ZERO));
}
