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View Compilation Error

0_0_36709514_3559\Main.java:4: 错误: 类HD3是公共的, 应在名为 HD3.java 的文件中声明
public class HD3 {
       ^
0_0_36709514_3559\Main.java:16: 错误: 二元运算符 '+' 的操作数类型错误
           int sum=a+b;
                    ^
  第一个类型:  BigInteger
  第二个类型: BigInteger
2 个错误


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