0_0_19656226_14919\Main.java:1: 错误: 需要class, interface或enum
Scanner scanner=new Scanner(System.in);
^
0_0_19656226_14919\Main.java:2: 错误: 需要class, interface或enum
while (scanner.hasNext()) {
^
0_0_19656226_14919\Main.java:4: 错误: 需要class, interface或enum
BigInteger resultBigInteger=new BigInteger("2").pow(n-1).add(new BigInteger("-1").pow(n)).divide(new BigInteger("3"));
^
0_0_19656226_14919\Main.java:5: 错误: 需要class, interface或enum
System.out.println(resultBigInteger);
^
0_0_19656226_14919\Main.java:6: 错误: 需要class, interface或enum
}
^
5 个错误
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