Game of Taking Stones (大数 + 威佐夫博弈 java写的)

C - Game of Taking Stones

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

public class Main
{

public static void main(String[] args)
{
BigDecimal TWO = BigDecimal.valueOf(2);
BigDecimal FIVE = BigDecimal.valueOf(5);

BigDecimal EPS = new BigDecimal(
"-0.0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001");

BigDecimal l = new BigDecimal("2.2360679774997"), r = new BigDecimal("2.2360679774998");
BigDecimal m = null;

while (l.subtract(r).compareTo(EPS) < 0)
{
m = l.add(r).divide(TWO);
if (m.multiply(m).subtract(FIVE).abs().compareTo(EPS.abs()) < 0)
break;
if (m.multiply(m).subtract(FIVE).compareTo(EPS) < 0)
l = m;
else
r = m;
}

BigDecimal GOLD = m.add(BigDecimal.ONE).divide(TWO);

Scanner sc = new Scanner(System.in);
while (sc.hasNext())
{
BigDecimal a = sc.nextBigDecimal(), b = sc.nextBigDecimal();
if (a.compareTo(b) > 0)
{
BigDecimal t = a;
a = b;
b = t;
}

BigDecimal c = b.subtract(a).setScale(0, BigDecimal.ROUND_FLOOR).multiply(GOLD);
c = c.setScale(0, BigDecimal.ROUND_FLOOR);
if (a.equals(c))
System.out.println("0");
else
System.out.println("1");
}
sc.close();
}
}