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View Compilation Error

0_0_29236427_8316\Main.java:12: 错误: multiply(long)在BigInteger中不是公共的; 无法从外部程序包中对其进行访问
			BigInteger y = x.multiply(4); 
			                ^
0_0_29236427_8316\Main.java:13: 错误: multiply(long)在BigInteger中不是公共的; 无法从外部程序包中对其进行访问
			BigInteger s = y.multiply(y.add(1)).divide(2).add(1).subtract(x.multiply(9));
			                                                               ^
0_0_29236427_8316\Main.java:13: 错误: 不兼容的类型: int无法转换为BigInteger
			BigInteger s = y.multiply(y.add(1)).divide(2).add(1).subtract(x.multiply(9));
			                                ^
注: 某些消息已经过简化; 请使用 -Xdiags:verbose 重新编译以获得完整输出
3 个错误


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