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View Compilation Error

0_0_7328057_21592\Main.java:5: 找不到符号
符号: 类 BufferedReader
位置: 类 Main
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
		^
0_0_7328057_21592\Main.java:5: 找不到符号
符号: 类 BufferedReader
位置: 类 Main
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
		                           ^
0_0_7328057_21592\Main.java:5: 找不到符号
符号: 类 InputStreamReader
位置: 类 Main
		BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
		                                              ^
0_0_7328057_21592\Main.java:38: 找不到符号
符号: 类 IOException
位置: 类 Main
		} catch (IOException e)
		         ^
4 错误


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