Repository: AI-Projects-AWS/AWSQ-business-Github
Pull request #2: My contribution
Author: login: KHemanthRaju
Labels: name: Amazon Q development agent
description: Generate new features or iterate code based on issue descriptions and comments.
name: Amazon Q transform agent
description: Upgrade codebase to latest language version.
Created: 2025-05-19T01:51:58Z | Merged: 2025-05-19T07:49:48Z



Diff:
diff --git a/three_sum.java b/three_sum.java
new file mode 100644
index 0000000..ae70d42
--- /dev/null
+++ b/three_sum.java
@@ -0,0 +1,90 @@
+import java.util.*;
+
+/**
+ * Solution for the 3Sum problem.
+ * 
+ * Given an array of integers, find all unique triplets in the array
+ * which gives the sum of zero.
+ */
+public class three_sum {
+    
+    /**
+     * Finds all unique triplets in the array which sum to zero.
+     * 
+     * @param nums The input array of integers
+     * @return A list of lists, where each inner list contains three integers that sum to zero
+     */
+    public static List<List<Integer>> threeSum(int[] nums) {
+        List<List<Integer>> result = new ArrayList<>();
+        
+        // Edge case: if array is null or has less than 3 elements
+        if (nums == null || nums.length < 3) {
+            return result;
+        }
+        
+        // Sort the array to handle duplicates and use two pointers approach
+        Arrays.sort(nums);
+        
+        for (int i = 0; i < nums.length - 2; i++) {
+            // Skip duplicates for the first element of the triplet
+            if (i > 0 && nums[i] == nums[i - 1]) {
+                continue;
+            }
+            
+            int target = -nums[i];
+            int left = i + 1;
+            int right = nums.length - 1;
+            
+            while (left < right) {
+                int sum = nums[left] + nums[right];
+                
+                if (sum == target) {
+                    // Found a triplet
+                    result.add(Arrays.asList(nums[i], nums[left], nums[right]));
+                    
+                    // Skip duplicates for the second element
+                    while (left < right && nums[left] == nums[left + 1]) {
+                        left++;
+                    }
+                    
+                    // Skip duplicates for the third element
+                    while (left < right && nums[right] == nums[right - 1]) {
+                        right--;
+                    }
+                    
+                    // Move both pointers
+                    left++;
+                    right--;
+                } else if (sum < target) {
+                    // Need a larger sum, move left pointer
+                    left++;
+                } else {
+                    // Need a smaller sum, move right pointer
+                    right--;
+                }
+            }
+        }
+        
+        return result;
+    }
+    
+    /**
+     * Main method for testing the threeSum function.
+     */
+    public static void main(String[] args) {
+        // Example 1
+        int[] nums1 = {-1, 0, 1, 2, -1, -4};
+        System.out.println("Example 1 Input: " + Arrays.toString(nums1));
+        System.out.println("Output: " + threeSum(nums1));
+        
+        // Example 2
+        int[] nums2 = {0, 0, 0};
+        System.out.println("\nExample 2 Input: " + Arrays.toString(nums2));
+        System.out.println("Output: " + threeSum(nums2));
+        
+        // Example 3
+        int[] nums3 = {-2, 0, 1, 1, 2};
+        System.out.println("\nExample 3 Input: " + Arrays.toString(nums3));
+        System.out.println("Output: " + threeSum(nums3));
+    }
+}
\ No newline at end of file
diff --git a/two_sum.py b/two_sum.py
index 72783d3..a04399f 100644
--- a/two_sum.py
+++ b/two_sum.py
@@ -1,40 +1,10 @@
-from typing import List, Optional
-
-def two_sum(nums: List[int], target: int) -> List[int]:
-    """
-    Returns the indices of the two numbers in `nums` that add up to `target`.
-    
-    Args:
-        nums (List[int]): List of integers.
-        target (int): Target sum.
-    
-    Returns:
-        List[int]: Indices of the two numbers that add up to the target.
-        Returns an empty list if no solution is found.
-        
-    Raises:
-        TypeError: If nums is not a list or target is not an integer.
-        ValueError: If nums is empty or contains non-integer values.
-    """
-    # Input validation
-    if nums is None:
-        raise TypeError("Input 'nums' cannot be None")
-    if not isinstance(nums, list):
-        raise TypeError("Input 'nums' must be a list")
-    if not nums:
-        raise ValueError("Input 'nums' cannot be empty")
-    if not all(isinstance(num, int) for num in nums):
-        raise ValueError("All elements in 'nums' must be integers")
-    if not isinstance(target, int):
-        raise TypeError("Input 'target' must be an integer")
-    
     num_map = {}  # To store number and its index
     
     for i, num in enumerate(nums):
         complement = target - num
         if complement in num_map:
             return [num_map[complement], i]
-        num_map[num] = i
+        
     
     return []  # If no solution is found
 


Reviews:
user: login: amazon-q-developer[bot]
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-19T01:52:43Z
user: login: amazon-q-developer[bot]
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-19T01:53:15Z
user: login: KHemanthRaju
state: COMMENTED
author_association: CONTRIBUTOR
submitted_at: 2025-05-19T01:53:52Z

Review comments:
diff_hunk: @@ -1,21 +1,11 @@
 def two_sum(nums, target):
-    """
-    Returns the indices of the two numbers in `nums` that add up to `target`.
-    
-    Args:
-        nums (List[int]): List of integers.
-        target (int): Target sum.
-    
-    Returns:
-        List[int]: Indices of the two numbers.
-    """
     num_map = {}  # To store number and its index
     
     for i, num in enumerate(nums):
         complement = target - num
         if complement in num_map:
             return [num_map[complement], i]
-        num_map[num] = i
+        
path: two_sum.py
user: login: amazon-q-developer[bot]
body: > [!WARNING]
> ****Description:**** After reviewing your changes for backwards compatibility, I noticed that the function's behavior has been altered. The line `num_map[num] = i` was removed, which prevents the function from storing new numbers in the map. This change will cause the function to fail for most inputs, potentially breaking existing code that relies on this function.

****Severity:**** High


created_at: 2025-05-19T01:52:43Z
author_association: CONTRIBUTOR
diff_hunk: @@ -1,21 +1,11 @@
 def two_sum(nums, target):
-    """
-    Returns the indices of the two numbers in `nums` that add up to `target`.
-    
-    Args:
-        nums (List[int]): List of integers.
-        target (int): Target sum.
-    
-    Returns:
-        List[int]: Indices of the two numbers.
-    """
     num_map = {}  # To store number and its index
     
     for i, num in enumerate(nums):
         complement = target - num
         if complement in num_map:
             return [num_map[complement], i]
-        num_map[num] = i
+        
path: two_sum.py
user: login: amazon-q-developer[bot]
body: Sorry, I'm not able to suggest a fix for this review finding.
created_at: 2025-05-19T01:53:15Z
author_association: CONTRIBUTOR
diff_hunk: @@ -1,21 +1,11 @@
 def two_sum(nums, target):
-    """
-    Returns the indices of the two numbers in `nums` that add up to `target`.
-    
-    Args:
-        nums (List[int]): List of integers.
-        target (int): Target sum.
-    
-    Returns:
-        List[int]: Indices of the two numbers.
-    """
     num_map = {}  # To store number and its index
     
     for i, num in enumerate(nums):
         complement = target - num
         if complement in num_map:
             return [num_map[complement], i]
-        num_map[num] = i
+        
path: two_sum.py
user: login: KHemanthRaju
body: Resolve this issue
created_at: 2025-05-19T01:53:52Z
author_association: CONTRIBUTOR

PR comments:
user: login: amazon-q-developer[bot]
created_at: 2025-05-19T01:52:02Z
body: :hourglass_flowing_sand: I'm reviewing this pull request for security vulnerabilities and code quality issues. I'll provide an update when I'm done
author_association: CONTRIBUTOR
user: login: amazon-q-developer[bot]
created_at: 2025-05-19T01:52:44Z
body: :white_check_mark: I finished the code review, and left comments with the issues I found. I will now generate code fix suggestions.
author_association: CONTRIBUTOR
user: login: KHemanthRaju
created_at: 2025-05-19T01:54:34Z
body: Can you review this again?
author_association: CONTRIBUTOR