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View Compilation Error

0_0_12161888_2643\Main.java:3: 找不到符号
符号： 类 Scanner
位置： 类 Main
    	 Scanner reader = new Scanner(System.in);
    	 ^
0_0_12161888_2643\Main.java:3: 找不到符号
符号： 类 Scanner
位置： 类 Main
    	 Scanner reader = new Scanner(System.in);
    	                      ^
2 错误


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