first commit

J07040 - LIỆT KÊ THEO THỨ TỰ XUẤT HIỆN.java

@@ -0,0 +1,28 @@
+import java.util.*;
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+
+public class Main{
+    public static void main(String[] arg)throws IOException, ClassNotFoundException {
+        ObjectInputStream o = new ObjectInputStream(new FileInputStream("NHIPHAN.in"));
+        ArrayList<String> a = (ArrayList<String>) o.readObject();  
+        ArrayList<String> b = new ArrayList<>();
+        a.forEach(s -> {
+            InputStream is = new ByteArrayInputStream(s.getBytes(StandardCharsets.UTF_8));
+            Scanner ss = new Scanner(is);
+            while(ss.hasNext()){
+                String x = ss.next().toLowerCase();
+                if(!b.contains(x)) b.add(x);
+            }
+        });
+        ArrayList<String> doc = new ArrayList<>();
+        Scanner sc = new Scanner(new File("VANBAN.in"));
+        while(sc.hasNext()){
+            String s = sc.next().toLowerCase();
+            if(!doc.contains(s)) doc.add(s);
+        }
+        doc.forEach(e -> {
+            if(b.contains(e)) System.out.println(e);
+        });
+    }
+}