Merge Strings Alternately | Leetcode Python Solution | Step-by-Step Explanation #leetcode #coding

In this video, we solve the Leetcode problem "Merge Strings Alternately" using Python in an efficient and easy-to-understand way.

The task is to merge two given strings by alternating characters from each string. If one string is longer, its remaining characters are appended to the end.

🔹 Step-by-Step Breakdown:

✅ Step 1: Define the Solution class

Leetcode requires the function to be inside a class named Solution.

✅ Step 2: Initialize Variables

Create an empty list merged to store merged characters.
Use two pointers i and j to iterate through word1 and word2.
Store the lengths of both strings in len1 and len2.

✅ Step 3: Merge Characters Alternately

Use a while loop to traverse both strings simultaneously.
Append one character from word1, then one from word2, and increment both pointers.
Repeat until the shorter string is fully processed.

✅ Step 4: Append Remaining Characters

✅ Step 5: Convert List to String

Use "".join(merged) to convert the list into a final merged string efficiently.

🛠️ Complexity Analysis:

⏳ Time Complexity: O(n + m) (where n and m are the lengths of word1 and word2).

💾 Space Complexity: O(n + m) (since we store the merged result in a list).

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