diff --git a/ajuda/README.md b/ajuda/README.md
new file mode 100644
index 0000000..04c9141
--- /dev/null
+++ b/ajuda/README.md
@@ -0,0 +1,2 @@
+# AEDII
+Repositório de códigos da disciplina de Algoritmos e Estrutura de Dados II
diff --git a/ajuda/java/Arq.java b/ajuda/java/Arq.java
new file mode 100644
index 0000000..9a632d1
--- /dev/null
+++ b/ajuda/java/Arq.java
@@ -0,0 +1,206 @@
+import java.io.*;
+import java.util.Formatter;
+import java.util.Scanner;
+import java.io.File;
+import java.nio.charset.*;
+
+public class Arq
+{
+   private static String nomeArquivo = "";
+   private static String charsetArquivo = "ISO-8859-1";
+   private static boolean write = false, read = false;
+   private static Formatter saida = null;
+   private static Scanner entrada = null;
+
+	public static boolean openWrite(String nomeArq, String charset) {
+      boolean resp = false;
+      close();
+		try{
+		   saida = new Formatter(nomeArq, charset);
+         nomeArquivo = nomeArq;
+         resp = write = true;
+		}  catch (Exception e) {}
+      return resp;
+   }
+
+	public static boolean openWrite(String nomeArq) {
+      return openWrite(nomeArq, charsetArquivo);
+   }
+
+	public static boolean openWriteClose(String nomeArq, String charset, String conteudo) {
+      boolean resp = openWrite(nomeArq, charset);
+      if(resp == true){
+         println(conteudo);
+         close();
+      }
+      return resp;
+   }
+
+	public static boolean openWriteClose(String nomeArq, String conteudo) {
+      return openWriteClose(nomeArq, charsetArquivo, conteudo);
+   }
+
+	public static boolean openRead(String nomeArq) {
+      return openRead(nomeArq, charsetArquivo);
+   }
+
+	public static boolean openRead(String nomeArq, String charset) {
+      boolean resp = false;
+      close();
+		try{
+         entrada = new Scanner(new File(nomeArq), charset);
+         nomeArquivo = nomeArq;
+         resp = read = true;
+		}  catch (Exception e) {}
+      return resp;
+   }
+
+   public static String openReadClose(String nomeArq){
+      openRead(nomeArq);
+      String resp = readAll();
+      close();
+      return resp;
+   }
+
+	public static void close() {
+      if(write == true){
+         saida.close();
+      }
+      if(read == true){
+         entrada.close();
+      }
+      write = read = false;
+      nomeArquivo = "";
+      charsetArquivo = "ISO-8859-1";
+	}
+
+   public static long length(){
+      long resp = -1;
+      if(read != write){
+         File file = new File(nomeArquivo);
+         resp = file.length();
+      }
+      return resp;
+   }
+
+   public static void print(int x){
+      if(write == true){
+		   saida.format( "%d", x);
+      }
+   }
+
+   public static void print(double x){
+      if(write == true){
+	   	saida.format( "%f", x);
+      }
+   }
+
+   public static void print(String x){
+      if(write == true){
+   		saida.format( "%s", x);
+      }
+   }
+
+   public static void print(boolean x){
+      if(write == true){
+		   saida.format( "%s", ((x) ? "true" : "false"));
+      }
+   }
+
+   public static void print(char x){
+      if(write == true){
+	   	saida.format( "%c", x);
+      }
+   }
+
+   public static void println(int x){
+      if(write == true){
+   		saida.format( "%d\n", x);
+      }
+   }
+
+   public static void println(double x){
+      if(write == true){
+		   saida.format( "%f\n", x);
+      }
+   }
+
+   public static void println(String x){
+      if(write == true){
+	   	saida.format( "%s\n", x);
+      }
+   }
+
+   public static void println(boolean x){
+      if(write == true){
+   		saida.format( "%s\n", ((x) ? "true" : "false"));
+      }
+   }
+
+   public static void println(char x){
+      if(write == true){
+		   saida.format( "%c\n", x);
+      }
+   }
+
+   public static int readInt(){
+      int resp = -1;
+		try{
+         resp = entrada.nextInt();
+		}  catch (Exception e) {}
+      return resp;
+   }
+
+   public static char readChar(){
+      char resp = ' ';
+		try{
+         resp = (char)entrada.nextByte();
+		}  catch (Exception e) {}
+      return resp;
+   }
+
+   public static double readDouble(){
+      double resp = -1;
+		try{
+         resp = Double.parseDouble(readString().replace(",","."));
+		}  catch (Exception e) {}
+      return resp;
+   }
+
+   public static String readString(){
+      String resp = "";
+		try{
+         resp = entrada.next();
+		}  catch (Exception e) { System.out.println(e.getMessage()); }
+      return resp;
+	}
+
+   public static boolean readBoolean(){
+      boolean resp = false;
+		try{
+         resp = (entrada.next().equals("true")) ? true : false;
+		}  catch (Exception e) {}
+      return resp;
+	}
+
+   public static String readLine(){
+      String resp = "";
+		try{
+         resp = entrada.nextLine();
+		}  catch (Exception e) { System.out.println(e.getMessage()); }
+      return resp;
+	}
+
+
+   public static boolean hasNext(){
+      return entrada.hasNext();
+   }
+
+   public static String readAll(){
+      String resp = "";
+      while(hasNext()){
+         resp += (readLine() + "\n");
+      }
+      return resp;
+   }
+}
diff --git a/ajuda/java/MyIO.java b/ajuda/java/MyIO.java
new file mode 100644
index 0000000..60b984c
--- /dev/null
+++ b/ajuda/java/MyIO.java
@@ -0,0 +1,238 @@
+import java.io.*;
+import java.nio.charset.*;
+
+class MyIO {
+
+   private static BufferedReader in = new BufferedReader(new InputStreamReader(System.in, Charset.forName("ISO-8859-1")));
+   private static String charset = "ISO-8859-1";
+
+   public static void setCharset(String charset_){
+      charset = charset_;
+      in = new BufferedReader(new InputStreamReader(System.in, Charset.forName(charset)));
+   }
+
+   public static void print(){
+   }
+
+   public static void print(int x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void print(double x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void print(String x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void print(boolean x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void print(char x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void println(){
+   }
+
+   public static void println(int x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.println(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void println(double x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.println(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void println(String x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.println(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void println(boolean x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.println(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void println(char x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.println(x);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static void printf(String formato, double x){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.printf(formato, x);// "%.2f"
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+   }
+
+   public static double readDouble(){
+      double d = -1;
+      try{
+         d = Double.parseDouble(readString().trim().replace(",","."));
+      }catch(Exception e){}
+      return d;
+   }
+
+   public static double readDouble(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      return readDouble();
+   }
+
+   public static float readFloat(){
+      return (float) readDouble();
+   }
+
+   public static float readFloat(String str){
+      return (float) readDouble(str);
+   }
+
+   public static int readInt(){
+      int i = -1;
+      try{
+         i = Integer.parseInt(readString().trim());
+      }catch(Exception e){}
+      return i;
+   }
+
+   public static int readInt(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      return readInt();
+   }
+
+   public static String readString(){
+      String s = "";
+      char tmp;
+      try{
+         do{
+            tmp = (char)in.read();
+            if(tmp != '\n' && tmp != ' ' && tmp != 13){
+               s += tmp;
+            }
+         }while(tmp != '\n' && tmp != ' ');
+      }catch(IOException ioe){
+         System.out.println("lerPalavra: " + ioe.getMessage());
+      }
+      return s;
+   }
+
+   public static String readString(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      return readString();
+   }
+
+   public static String readLine(){
+      String s = "";
+      char tmp;
+      try{
+         do{
+            tmp = (char)in.read();
+            if(tmp != '\n' && tmp != 13){
+               s += tmp;
+            }
+         }while(tmp != '\n');
+      }catch(IOException ioe){
+         System.out.println("lerPalavra: " + ioe.getMessage());
+      }
+      return s;
+   }
+
+   public static String readLine(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      return readLine();
+   }
+
+   public static char readChar(){
+      char resp = ' ';
+      try{
+         resp  = (char)in.read();
+      }catch(Exception e){}
+      return resp;
+   }
+
+   public static char readChar(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      return readChar();
+   }
+
+   public static boolean readBoolean(){
+      boolean resp = false;
+      String str = "";
+
+      try{
+         str = readString();
+      }catch(Exception e){}
+
+      if(str.equals("true") || str.equals("TRUE") || str.equals("t") || str.equals("1") || 
+            str.equals("verdadeiro") || str.equals("VERDADEIRO") || str.equals("V")){
+         resp = true;
+            }
+
+      return resp;
+   }
+
+   public static boolean readBoolean(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      return readBoolean();
+   }
+
+   public static void pause(){
+      try{
+         in.read();
+      }catch(Exception e){}
+   }
+
+   public static void pause(String str){
+      try {
+         PrintStream out = new PrintStream(System.out, true, charset);
+         out.print(str);
+      }catch(UnsupportedEncodingException e){ System.out.println("Erro: charset invalido"); }
+      pause();
+   }
+}