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View Compilation Error

0_0_32000051_19167\Main.java:16: 错误: 找不到符号
            catalans[i] = catalans[i-1].multiply(four.multiply(BigInteger.valueOf(i)).subtract(two)).divide(BigInteger.valueOf(i+1));
                                                                                               ^
  符号:   变量 two
  位置: 类 Main
1 个错误


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