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View Compilation Error

0_0_7799463_13818\Main.java:2: 找不到符号
符号: 类 IOException
位置: 类 Main
	   void solve() throws IOException
	                       ^
0_0_7799463_13818\Main.java:16: 找不到符号
符号: 类 StreamTokenizer
位置: 类 Main
	   StreamTokenizer in;
	   ^
0_0_7799463_13818\Main.java:17: 找不到符号
符号: 类 PrintWriter
位置: 类 Main
	   PrintWriter out;
	   ^
0_0_7799463_13818\Main.java:19: 找不到符号
符号: 类 IOException
位置: 类 Main
	   int nextInt() throws IOException
	                        ^
0_0_7799463_13818\Main.java:6: 找不到符号
符号: 变量 StreamTokenizer
位置: 类 Main
	      while(in.nextToken() != StreamTokenizer.TT_EOF)
	                              ^
0_0_7799463_13818\Main.java:29: 找不到符号
符号: 类 StreamTokenizer
位置: 类 Main
	         in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
	                  ^
0_0_7799463_13818\Main.java:29: 找不到符号
符号: 类 BufferedReader
位置: 类 Main
	         in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
	                                      ^
0_0_7799463_13818\Main.java:29: 找不到符号
符号: 类 InputStreamReader
位置: 类 Main
	         in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
	                                                         ^
0_0_7799463_13818\Main.java:30: 找不到符号
符号: 类 PrintWriter
位置: 类 Main
	         out = new PrintWriter(new OutputStreamWriter(System.out));
	                   ^
0_0_7799463_13818\Main.java:30: 找不到符号
符号: 类 OutputStreamWriter
位置: 类 Main
	         out = new PrintWriter(new OutputStreamWriter(System.out));
	                                   ^
0_0_7799463_13818\Main.java:34: 找不到符号
符号: 类 IOException
位置: 类 Main
	      catch (IOException e)
	             ^
11 错误


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