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View Compilation Error

0_0_3982795_28264\Main.java:27: 找不到符号
符号: 类 BigInteger
位置: 类 Main
    static final BigInteger[] f = new BigInteger[210];
                 ^
0_0_3982795_28264\Main.java:8: 找不到符号
符号: 类 Scanner
位置: 类 Main
        Scanner cin = new Scanner(System.in);
        ^
0_0_3982795_28264\Main.java:8: 找不到符号
符号: 类 Scanner
位置: 类 Main
        Scanner cin = new Scanner(System.in);
                          ^
0_0_3982795_28264\Main.java:27: 找不到符号
符号: 类 BigInteger
位置: 类 Main
    static final BigInteger[] f = new BigInteger[210];
                                      ^
0_0_3982795_28264\Main.java:20: 找不到符号
符号: 变量 BigInteger
位置: 类 Main
        f[1] = BigInteger.ONE;
               ^
0_0_3982795_28264\Main.java:21: 找不到符号
符号: 变量 BigInteger
位置: 类 Main
        f[2] = BigInteger.valueOf(2);
               ^
6 错误


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