diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 00000000..26d33521
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/.idea/Two-Pointers-1.iml b/.idea/Two-Pointers-1.iml
new file mode 100644
index 00000000..b107a2dd
--- /dev/null
+++ b/.idea/Two-Pointers-1.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/codeStyles/Project.xml b/.idea/codeStyles/Project.xml
new file mode 100644
index 00000000..919ce1f1
--- /dev/null
+++ b/.idea/codeStyles/Project.xml
@@ -0,0 +1,7 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <ScalaCodeStyleSettings>
+      <option name="MULTILINE_STRING_CLOSING_QUOTES_ON_NEW_LINE" value="true" />
+    </ScalaCodeStyleSettings>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/.idea/codeStyles/codeStyleConfig.xml b/.idea/codeStyles/codeStyleConfig.xml
new file mode 100644
index 00000000..a55e7a17
--- /dev/null
+++ b/.idea/codeStyles/codeStyleConfig.xml
@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 00000000..f5bd2dfe
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="openjdk-25" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 00000000..700c1aac
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/Two-Pointers-1.iml" filepath="$PROJECT_DIR$/.idea/Two-Pointers-1.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 00000000..35eb1ddf
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/ContainerWithMostWater.java b/ContainerWithMostWater.java
new file mode 100644
index 00000000..5f43b648
--- /dev/null
+++ b/ContainerWithMostWater.java
@@ -0,0 +1,41 @@
+public class ContainerWithMostWater {
+    public static void main(String args[]){
+        //int [] arr = {1,8,6,2,5,4,8,3,7};
+        int [] arr ={2,5,3,8,10,6,12,10};
+        System.out.println(maxArea(arr));
+    }
+
+    public static int maxArea(int[] height) {
+        /*
+        //Brute-force approach
+        int n = height.length;
+        int maxArea = 0;
+        for(int i =0; i<n; i++){ //O(n)
+            for(int j=i+1; j<n; j++){ //O(n) --> total time complexity O(n^2)
+                int currArea = Math.min(height[i], height[j]) * (j-i);
+                maxArea = Math.max(maxArea,currArea);
+            }
+        }
+         */
+
+        //two-pointer approach
+        int n = height.length;
+        int maxArea = 0;
+        int left = 0;
+        int right = n-1;
+        while(left<right){ //O(n)
+            int currArea = Math.min(height[left],height[right]) * (right - left);
+            maxArea = Math.max(maxArea, currArea);
+            if(height[left] < height[right]) {
+                left++;
+            } else {
+                right--;
+            }
+        }
+        return maxArea;
+    }
+
+}
+
+//Time complexity : O(n)
+//Space complexity : O(1)
\ No newline at end of file
diff --git a/SortColors.java b/SortColors.java
new file mode 100644
index 00000000..56e0cc1c
--- /dev/null
+++ b/SortColors.java
@@ -0,0 +1,38 @@
+import java.util.Arrays;
+public class SortColors {
+    public void sortColors(int[] nums) {
+        int n =  nums.length;
+        int left = 0;
+        int right = n-1;
+        int mid = 0;
+        while(mid <= right){ //O(n)
+            if(nums[mid] == 2){
+                swap(nums, mid, right);
+                right --;
+            } else if(nums[mid] == 0){
+                swap(nums, mid, left);
+                left++;
+                mid++;
+            } else {
+                mid++;
+            }
+        }
+    }
+    private void swap(int[] nums, int i, int j){
+        int temp = nums[i];
+        nums[j] = nums[i];
+        nums[i] = temp;
+    }
+
+    public static void main(String[] args) {
+        int[] arr2 = {0,0,2,1,1,0,0,1,2,2};
+
+        SortColors sc = new SortColors();
+        sc.sortColors(arr2);
+
+        System.out.println(Arrays.toString(arr2));
+    }
+}
+
+//Time complexity : O(n)
+//Space complexity : O(1)
\ No newline at end of file
diff --git a/ThreeSum.java b/ThreeSum.java
new file mode 100644
index 00000000..04060422
--- /dev/null
+++ b/ThreeSum.java
@@ -0,0 +1,57 @@
+import java.util.*;
+
+public class ThreeSum {
+    public static List<List<Integer>> threeSum(int[] nums) {
+        int n = nums.length;
+        //Condition to check if length of array less than 3 or if its empty
+        if (nums == null || n < 3) return new ArrayList<>();
+
+        //Step 1: Sort the elements in array
+        Arrays.sort(nums);
+        Set<List<Integer>> result = new HashSet<>();
+        //Step 2: Using Two-pointer approach
+        //Fix position of first element i.e. nums[i], traverse until < n-2 as we need triplets in end
+        for (int i = 0; i < n - 2; i++) { //0(n)
+            int l = i + 1;
+            int r = n - 1;
+            while (l < r) {   //0(n)
+                int sum = nums[i] + nums[l] + nums[r];
+                if (sum == 0) {
+                    //Add the set and move to find other triplets, increment left and decrement right
+                    result.add(Arrays.asList(nums[i], nums[l], nums[r]));
+                    l++;
+                    r--;
+                } else if (sum < 0) {
+                    l++;
+                } else {
+                    r--;
+                }
+            }
+        }
+        return new ArrayList<>(result);
+    }
+        /*
+        //Brute-force approach
+        for(int i=0; i<n-2;i++){
+            for(int j=i+1;j<n-1;j++){
+                for(int k=j+1;k<n;k++){
+                    int sum = nums[i] + nums[j] + nums[k];
+                    if(sum==0){
+                        result.add(Arrays.asList(nums[i],nums[j],nums[k]));
+                    }
+                }
+            }
+        }
+
+        return new ArrayList<>(result);
+    }
+    */
+
+    public static void main(String args[]){
+        int [] arr1 ={-1,0,1,2,-1,-4};
+        System.out.println(threeSum(arr1));
+    }
+}
+
+//Time complexity : 0(n^2)
+//Space complexity : O(n)
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/.idea/.gitignore b/out/production/Two-Pointers-1/.idea/.gitignore
new file mode 100644
index 00000000..26d33521
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/.gitignore
@@ -0,0 +1,3 @@
+# Default ignored files
+/shelf/
+/workspace.xml
diff --git a/out/production/Two-Pointers-1/.idea/Two-Pointers-1.iml b/out/production/Two-Pointers-1/.idea/Two-Pointers-1.iml
new file mode 100644
index 00000000..b107a2dd
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/Two-Pointers-1.iml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$" isTestSource="false" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/.idea/codeStyles/Project.xml b/out/production/Two-Pointers-1/.idea/codeStyles/Project.xml
new file mode 100644
index 00000000..919ce1f1
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/codeStyles/Project.xml
@@ -0,0 +1,7 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <ScalaCodeStyleSettings>
+      <option name="MULTILINE_STRING_CLOSING_QUOTES_ON_NEW_LINE" value="true" />
+    </ScalaCodeStyleSettings>
+  </code_scheme>
+</component>
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/.idea/codeStyles/codeStyleConfig.xml b/out/production/Two-Pointers-1/.idea/codeStyles/codeStyleConfig.xml
new file mode 100644
index 00000000..a55e7a17
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/codeStyles/codeStyleConfig.xml
@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="PREFERRED_PROJECT_CODE_STYLE" value="Default" />
+  </state>
+</component>
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/.idea/misc.xml b/out/production/Two-Pointers-1/.idea/misc.xml
new file mode 100644
index 00000000..f5bd2dfe
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager" version="2" project-jdk-name="openjdk-25" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/.idea/modules.xml b/out/production/Two-Pointers-1/.idea/modules.xml
new file mode 100644
index 00000000..700c1aac
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/Two-Pointers-1.iml" filepath="$PROJECT_DIR$/.idea/Two-Pointers-1.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/.idea/vcs.xml b/out/production/Two-Pointers-1/.idea/vcs.xml
new file mode 100644
index 00000000..35eb1ddf
--- /dev/null
+++ b/out/production/Two-Pointers-1/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/out/production/Two-Pointers-1/ContainerWithMostWater.class b/out/production/Two-Pointers-1/ContainerWithMostWater.class
new file mode 100644
index 00000000..11b1303a
Binary files /dev/null and b/out/production/Two-Pointers-1/ContainerWithMostWater.class differ
diff --git a/out/production/Two-Pointers-1/README.md b/out/production/Two-Pointers-1/README.md
new file mode 100644
index 00000000..16da027c
--- /dev/null
+++ b/out/production/Two-Pointers-1/README.md
@@ -0,0 +1,8 @@
+# Two-Pointers-1
+
+## Problem1 (https://leetcode.com/problems/sort-colors/)
+
+## Problem2 (https://leetcode.com/problems/3sum/)
+
+## Problem3 (https://leetcode.com/problems/container-with-most-water/)
+
diff --git a/out/production/Two-Pointers-1/SortColors.class b/out/production/Two-Pointers-1/SortColors.class
new file mode 100644
index 00000000..51eea564
Binary files /dev/null and b/out/production/Two-Pointers-1/SortColors.class differ
diff --git a/out/production/Two-Pointers-1/ThreeSum.class b/out/production/Two-Pointers-1/ThreeSum.class
new file mode 100644
index 00000000..121cc583
Binary files /dev/null and b/out/production/Two-Pointers-1/ThreeSum.class differ