View Compilation Error

0_0_36890253_17096\Main.java:7: 错误: TWO可以在BigInteger中访问private
        static BigInteger two = BigInteger.TWO;
                                          ^
0_0_36890253_17096\Main.java:13: 错误: TWO可以在BigInteger中访问private
                        if ( b.mod(BigInteger.TWO).compareTo(BigInteger.ONE) == 0 ) res = res.multiply(a).mod(m);
                                             ^
0_0_36890253_17096\Main.java:15: 错误: TWO可以在BigInteger中访问private
                        b = b.divide(BigInteger.TWO);
                                               ^
3 个错误