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View Compilation Error

0_0_23332419_16526\Main.java:2: 错误: 找不到符号
import java.util.BigInteger;
                ^
  符号:   类 BigInteger
  位置: 程序包 java.util
0_0_23332419_16526\Main.java:9: 错误: 找不到符号
BigInteger a = in.nextBigInteger();
^
  符号:   类 BigInteger
  位置: 类 Main
0_0_23332419_16526\Main.java:10: 错误: 找不到符号
BigInteger b = in.nextBigInteger();
^
  符号:   类 BigInteger
  位置: 类 Main
3 个错误


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