import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Method;
import java.net.URI;
import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;import javax.tools.Diagnostic;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import javax.tools.ToolProvider;public class CompileAndRunJavaFile {public static void main(String[] args) {StringBuilder code = new StringBuilder();try {BufferedReader br = new BufferedReader(new FileReader(new File("测试程序地址")));String content;while((content = br.readLine()) != null){code.append(content).append("\n");}} catch (Exception e) {e.printStackTrace();}CompileAndRunJavaFile cr = new CompileAndRunJavaFile();cr.compileAndRunJavaFile(code.toString());if(cr.isCompileAndRunOK()) {System.out.println("运行时间: " + cr.getUseTime() + "ms");System.out.println("内存使用: " + cr.getUseMemory() + "kb9");System.out.println("运行结果: \n" + cr.getOutMsg());} else if(cr.isCompilerError()) {System.out.println("编译错误: " + cr.getCE());} else if(cr.isRunningError()) {System.out.println("运行错误: " + cr.getError());}}//编译错误private StringBuilder ce = new StringBuilder();public String getCE(){return ce.toString();}//内存使用private double useMemory = 0.0;public double getUseMemory(){return useMemory;}//运行时间private long useTime = 0;public long getUseTime(){return useTime;}//输出信息private StringBuilder outMsg = new StringBuilder();public String getOutMsg(){return outMsg.toString();}//异常信息private String error = null;public String getError(){return error;}//是否正常编译并运行private boolean isCompileAndRunOK = false; public boolean isCompileAndRunOK(){return isCompileAndRunOK;}//程序的运行时间, 单位：msprivate int limitTime = 2000;//程序所占内存, 单位 ：KBprivate double limitMemory = 256000.0;public void setLimitTime(int limitTime){this.limitTime = limitTime;}public void setLimitMemory(double limitMemory){this.limitMemory = limitMemory;}//是否为编译错误private boolean isCompilerError = false;public boolean isCompilerError(){return isCompilerError;}//是否为运行错误private boolean isRunningError = false;public boolean isRunningError(){return isRunningError;}private static final String className = "Main";private static final String methodName = "main";private String getClassOutput(){//设置class文件的存放位置if(System.getProperty("java.class.path").contains("bin")) return "bin/";else return "./";}private void compileAndRunJavaFile(String code){PrintStream ps = null;FileInputStream fis = null;BufferedReader br = null;//保存标准输出流InputStream stdIn = System.in;//保存标准输入流PrintStream stdOut = System.out;//为源代码导入默认的包code = "import java.util.*;\n" + code;try {JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();// define the diagnostic object, which will be used to save the// diagnostic informationDiagnosticCollector<JavaFileObject> oDiagnosticCollector = new DiagnosticCollector<JavaFileObject>();StandardJavaFileManager fileManager = compiler.getStandardFileManager(oDiagnosticCollector, null, null);// set class output locationfileManager.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(new File[] { new File(getClassOutput()) }));StringSourceJavaObject sourceObject = new CompileAndRunJavaFile.StringSourceJavaObject(className, code);Iterable<? extends JavaFileObject> fileObjects = Arrays.asList(sourceObject);CompilationTask task = compiler.getTask(null, fileManager, oDiagnosticCollector, null, null, fileObjects);boolean result = task.call();if (result) {Runtime runtime = Runtime.getRuntime();Class<?> clazz = Class.forName(className);Method method = clazz.getMethod(methodName, new Class<?>[]{String[].class});//重置输入流， 需要存放数据文件的文件名fis = new FileInputStream(new File("数据文件地址"));System.setIn(fis);//重置输出流，需要获得控制台的输出ByteArrayOutputStream bao = new ByteArrayOutputStream();ps = new PrintStream(bao);System.setOut(ps);long startFreeMemory = runtime.freeMemory();//Java 虚拟机中的空闲内存量//执行时间也是无法知道，因为dos执行java命令，程序无法知道它到底执行到那里了，两个进程，互不了解long startCurrentTime = System.currentTimeMillis();//获取系统当前时间method.invoke(null, new Object[]{null});long endCurrentTime = System.currentTimeMillis();long endFreeMemory = runtime.freeMemory();//内存的使用情况，不是很精确useMemory = (startFreeMemory-endFreeMemory)/1024.0;if(useMemory > limitMemory) throw new Exception("Out Limit Memory!");useTime = endCurrentTime-startCurrentTime;if(useTime > limitTime) throw new Exception("Time Limited!");//获得控制台的输出br = new BufferedReader(new InputStreamReader(new ByteArrayInputStream(bao.toByteArray())));String outc = null;while((outc = br.readLine()) != null)outMsg.append(outc).append("\n");//正常编译并运行isCompileAndRunOK = true;} else {isCompilerError = true;//打印编译的错误信息Pattern p = Pattern.compile("Main.java\\D*(\\d+):", Pattern.DOTALL);for (Diagnostic<? extends JavaFileObject> oDiagnostic : oDiagnosticCollector.getDiagnostics()){/*信息示例：Compiler Error: Main.java:8: 找不到符号符号： 类 Scanner位置： 类 Main*///将行号减1Matcher m = p.matcher("Compiler Error: " + oDiagnostic.getMessage(null));if(m.find()) {ce.append(m.replaceAll("Main.java " + String.valueOf(Integer.valueOf(m.group(1))-1)) + ":").append("\n");} else {ce.append("Compiler Error: " + oDiagnostic.getMessage(null)).append("\n");}}}} catch (Exception e) {isRunningError = true;StringWriter sw = new StringWriter();e.printStackTrace(new PrintWriter(sw, true));Pattern p = Pattern.compile("Main.java\\D*(\\d+)", Pattern.DOTALL);Matcher m = p.matcher(sw.toString());if(m.find()){error = m.replaceAll("Main.java " + String.valueOf(Integer.valueOf(m.group(1))-1) + ":");} else {error = sw.toString();}} finally {//关闭流try {if(fis != null)fis.close();if(ps != null)ps.close();    if(br != null)br.close();} catch (IOException e) {e.printStackTrace();}//恢复输入输出流
            System.setIn(stdIn);System.setOut(stdOut);}}private class StringSourceJavaObject extends SimpleJavaFileObject {private String content = null;public StringSourceJavaObject(String name, String content) {super(URI.create(name.replace('.', '/') + Kind.SOURCE.extension), Kind.SOURCE);this.content = content;}public CharSequence getCharContent(boolean ignoreEncodingErrors) {return content;}}
}

public class Main {public static void fun(){fun();}public static void main(String[] args) {Scanner scan = new Scanner(System.in);int n = scan.nextInt();int[] array = new int[n];for(int i=0; i<n; ++i)array[i] = scan.nextInt();for(int i=0; i<n; ++i)System.out.print(array[i] + " ");System.out.println();//array[n+1] = 0;//fun();
    }}