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View Compilation Error

0_0_2577495_23983\Main.java:4: 找不到符号
符号: 类 Scanner
位置: 类 Main
		Scanner sc = new Scanner(System.in);
		^
0_0_2577495_23983\Main.java:4: 找不到符号
符号: 类 Scanner
位置: 类 Main
		Scanner sc = new Scanner(System.in);
		                 ^
2 错误


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