Arrays by IshaAggarwalDev · Pull Request #4 · IshaAggarwalDev/LeetCode-DSA-Practi

IshaAggarwalDev · 2026-02-22T18:49:09Z

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Implemented the Two Sum problem using a brute-force technique. The solution iterates through all possible pairs using nested loops to identify the indices whose sum equals the target. Time Complexity: O(n²) Space Complexity: O(1)

Solved the Two Sum problem using an optimized HashMap approach. The solution iterates through the array once while storing previously seen elements in a HashMap. For each element, the complement (target − current value) is calculated and checked in the map to find the required pair efficiently. This reduces the time complexity from O(n²) to O(n). Time Complexity: O(n) Space Complexity: O(n)

Implemented the Two Sum problem using a brute-force technique. The solution iterates through all possible pairs using nested loops to identify the indices whose sum equals the target. Time Complexity: O(n²) Space Complexity: O(1)

…cates_from_Sorted_Array.java

…uplicates_from_Sorted_Array.java

…Duplicates_from_Sorted_Array.java

…Buy_and_Sell_Stock.java

…st_Consecutive_Sequence.java

…_Sum.java

…Water.java

IshaAggarwalDev added 30 commits February 14, 2026 10:31

Create TwoSum.java

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Implemented the Two Sum problem using a brute-force technique. The solution iterates through all possible pairs using nested loops to identify the indices whose sum equals the target. Time Complexity: O(n²) Space Complexity: O(1)

Update README.md

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Rename TwoSum.java to TwoSum_BruteForce.java

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Update TwoSum_BruteForce.java

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Implemented the Two Sum problem using a brute-force technique. The solution iterates through all possible pairs using nested loops to identify the indices whose sum equals the target. Time Complexity: O(n²) Space Complexity: O(1)

Update README.md

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Rename TwoSum_BruteForce.java to 1_TwoSum_BruteForce.java

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Rename TwoSum_HashMap.java to 1_TwoSum_HashMap.java

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Create 560_Subarray_Sum_Equals_K.java

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Rename Subarray_Sum_Equals_K.java to 560_Subarray_Sum_Equals_K.java

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Update README.md

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Create 128_Longest_Consecutive_Sequence.java

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Create 523_ Continuous_Subarray_Sum.java

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Update README.md

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Create 49_Group_Anagrams.java

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Rename 1_TwoSum_BruteForce.java to 001_TwoSum_BruteForce.java

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Rename 1_TwoSum_HashMap.java to 001_TwoSum_HashMap.java

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Rename 49_Group_Anagrams.java to 049_Group_Anagrams.java

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Update README.md

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Update README.md

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Create 121_Best_Time_to_Buy_and_Sell_Stock.java

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Create 268_Missing_Number.java

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Create 704_Binary_Search.java

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Update 704_Binary_Search.java

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Create 26Remove_Duplicates_from_Sorted_Array.java

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Rename 26Remove_Duplicates_from_Sorted_Array.java to 026_Remove_Dupli…

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…cates_from_Sorted_Array.java

IshaAggarwalDev added 30 commits February 17, 2026 13:08

Rename 001_TwoSum_BruteForce.java to 0001_TwoSum_BruteForce.java

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Rename 001_TwoSum_HashMap.java to 0001_TwoSum_HashMap.java

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Rename 026_Remove_Duplicates_from_Sorted_Array.java to 00026_Remove_D…

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…uplicates_from_Sorted_Array.java

Rename 00026_Remove_Duplicates_from_Sorted_Array.java to 0026_Remove_…

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…Duplicates_from_Sorted_Array.java

Rename 049_Group_Anagrams.java to 0049_Group_Anagrams.java

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Rename 121_Best_Time_to_Buy_and_Sell_Stock.java to 0121_Best_Time_to_…

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…Buy_and_Sell_Stock.java

Update and rename 128_Longest_Consecutive_Sequence.java to 0128_Longe…

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…st_Consecutive_Sequence.java

Rename 268_Missing_Number.java to 0268_Missing_Number.java

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Rename 283_Move_Zeroes.java to 0283_Move_Zeroes.java

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Rename 523_ Continuous_Subarray_Sum.java to 0523_ Continuous_Subarray…

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…_Sum.java

Rename 560_Subarray_Sum_Equals_K.java to 0560_Subarray_Sum_Equals_K.java

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Rename 704_Binary_Search.java to 0704_Binary_Search.java

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Create 0088_Merge_Sorted_Array.java

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Update README.md

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Create 0053_Maximum_Subarray.java

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Create 75_Sort_Colors.java

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Rename 75_Sort_Colors.java to 0075_Sort_Colors.java

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Create 11_Container_With_Most_Water.java

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Rename 11_Container_With_Most_Water.java to 0011_Container_With_Most_…

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…Water.java

Update README.md

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Update README.md

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Delete 0049_Group_Anagrams.java

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Delete 2396_Strictly_Palindromic_Number.java

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Delete 0001_TwoSum_HashMap.java

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Delete 0128_Longest_Consecutive_Sequence.java

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Delete 0523_ Continuous_Subarray_Sum.java

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Delete 0560_Subarray_Sum_Equals_K.java

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Arrays#4

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IshaAggarwalDev wants to merge 63 commits intomainfrom
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IshaAggarwalDev commented Feb 22, 2026

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IshaAggarwalDev commented Feb 22, 2026

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