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View Compilation Error

0_0_4618716_12534\Main.java:10: 找不到符号
符号: 变量 cin
位置: 类 Main
        while (cin.hasNext()) {
               ^
0_0_4618716_12534\Main.java:11: 找不到符号
符号: 变量 cin
位置: 类 Main
            int n = cin.nextInt();
                    ^
2 错误


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