From 9c9b80e5a74d0d2eefaf2ca69da9e225e0a26f79 Mon Sep 17 00:00:00 2001
From: Tushar Kesarwani <92527686+TusharKesarwani@users.noreply.github.com>
Date: Fri, 29 Oct 2021 20:22:03 +0530
Subject: [PATCH 1/3] Added ArrayList in Java

---
 Java/ArrayList.java | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Java/ArrayList.java

diff --git a/Java/ArrayList.java b/Java/ArrayList.java
new file mode 100644
index 0000000..d9f6d0d
--- /dev/null
+++ b/Java/ArrayList.java
@@ -0,0 +1,36 @@
+import java.io.*;
+import java.util.*;
+import java.text.*;
+import java.math.*;
+import java.util.regex.*;
+
+public class Solution {
+
+    public static void main(String[] args) {
+        Scanner sc = new Scanner(System.in);
+        ArrayList<Integer> L = new ArrayList<Integer>();
+        int N = sc.nextInt();
+        for(int i=0;i<N;i++){
+            int num = sc.nextInt();
+            L.add(i,num);                 //Adding elements in an arraylist
+        }
+        String ins = "Insert";
+        String del = "Delete";
+        int Q = sc.nextInt();             //Raising queries in an arraylist
+        for(int i=0;i<Q;i++){
+            String s = sc.next();
+            if(s.equals(ins)){
+                int ind = sc.nextInt();
+                int val = sc.nextInt();
+                L.add(ind,val);           //Inserting new elements in an arraylist
+            }
+            else if(s.equals(del)){
+                int ind = sc.nextInt();
+                L.remove(ind);            //Deleting existing elements in an arraylist
+            }
+        }
+        for(int i=0;i<L.size();i++) {               
+            System.out.print(L.get(i) +" ");      //Displaying number of element left in an arraylist   
+        }   
+    }
+}

From f57e8b8a246086a1a17942a3bdcc5911eeb879e9 Mon Sep 17 00:00:00 2001
From: Tushar Kesarwani <92527686+TusharKesarwani@users.noreply.github.com>
Date: Fri, 29 Oct 2021 20:50:22 +0530
Subject: [PATCH 2/3] Added 2D_ArrayList.java

---
 Java/2D_ArrayList.java | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Java/2D_ArrayList.java

diff --git a/Java/2D_ArrayList.java b/Java/2D_ArrayList.java
new file mode 100644
index 0000000..544b36c
--- /dev/null
+++ b/Java/2D_ArrayList.java
@@ -0,0 +1,36 @@
+import java.io.*;
+import java.math.*;
+import java.security.*;
+import java.text.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.regex.*;
+
+public class Solution {
+    public static void main(String[] args) throws IOException {
+        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
+        List<List<Integer>> arr = new ArrayList<>();                                                   //Creating 2D ArrayList
+        for (int i = 0; i < 6; i++) {
+            String[] arrRowTempItems = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");
+            List<Integer> arrRowItems = new ArrayList<>();
+            for (int j = 0; j < 6; j++) {
+                int arrItem = Integer.parseInt(arrRowTempItems[j]);
+                arrRowItems.add(arrItem);
+            }
+            arr.add(arrRowItems);                                         //Adding elements in an arraylist
+        }
+
+        bufferedReader.close();
+        
+        int count=-99;
+        for(int i=0;i<4;i++){
+            for(int j=0;j<4;j++){
+                int num = ((arr.get(i).get(j))+(arr.get(i).get(j+1))+(arr.get(i).get(j+2))+(arr.get(i+1).get(j+1))+(arr.get(i+2).get(j))+(arr.get(i+2).get(j+1))+(arr.get(i+2).get(j+2)));                                         //Obtaining the sum of an hourglass in a 2D ArrayList
+                if(num>=count){                                         //Checking sum of an hourglass is greater than count or not
+                    count = num;                                        //If greater, then value of count becomes equal to an hourglass
+                }
+            }
+        }
+        System.out.println(count);                                     //Printing maximum sum of an hourglass possible in a given 2D ArrayList
+    }
+}

From 991da350bea161baf4239a73a5df0a11484ff29a Mon Sep 17 00:00:00 2001
From: Tushar Kesarwani <92527686+TusharKesarwani@users.noreply.github.com>
Date: Fri, 29 Oct 2021 20:55:49 +0530
Subject: [PATCH 3/3] Delete 2D_ArrayList.java

---
 Java/2D_ArrayList.java | 36 ------------------------------------
 1 file changed, 36 deletions(-)
 delete mode 100644 Java/2D_ArrayList.java

diff --git a/Java/2D_ArrayList.java b/Java/2D_ArrayList.java
deleted file mode 100644
index 544b36c..0000000
--- a/Java/2D_ArrayList.java
+++ /dev/null
@@ -1,36 +0,0 @@
-import java.io.*;
-import java.math.*;
-import java.security.*;
-import java.text.*;
-import java.util.*;
-import java.util.concurrent.*;
-import java.util.regex.*;
-
-public class Solution {
-    public static void main(String[] args) throws IOException {
-        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
-        List<List<Integer>> arr = new ArrayList<>();                                                   //Creating 2D ArrayList
-        for (int i = 0; i < 6; i++) {
-            String[] arrRowTempItems = bufferedReader.readLine().replaceAll("\\s+$", "").split(" ");
-            List<Integer> arrRowItems = new ArrayList<>();
-            for (int j = 0; j < 6; j++) {
-                int arrItem = Integer.parseInt(arrRowTempItems[j]);
-                arrRowItems.add(arrItem);
-            }
-            arr.add(arrRowItems);                                         //Adding elements in an arraylist
-        }
-
-        bufferedReader.close();
-        
-        int count=-99;
-        for(int i=0;i<4;i++){
-            for(int j=0;j<4;j++){
-                int num = ((arr.get(i).get(j))+(arr.get(i).get(j+1))+(arr.get(i).get(j+2))+(arr.get(i+1).get(j+1))+(arr.get(i+2).get(j))+(arr.get(i+2).get(j+1))+(arr.get(i+2).get(j+2)));                                         //Obtaining the sum of an hourglass in a 2D ArrayList
-                if(num>=count){                                         //Checking sum of an hourglass is greater than count or not
-                    count = num;                                        //If greater, then value of count becomes equal to an hourglass
-                }
-            }
-        }
-        System.out.println(count);                                     //Printing maximum sum of an hourglass possible in a given 2D ArrayList
-    }
-}