String-7 | 28. Find the Index of the First Occurrence in a String |🔥Beginner,Medium & Advanced Level
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🔍 Leetcode 28: Find the Index of the First Occurrence in a String - Brute Force Approach Explained! 🔍
🚀 In this video, we solve the Find the Index of the First Occurrence in a String problem from Leetcode (#28) using the brute force approach. This simple yet effective method iterates through the string to find the first occurrence of a given substring.
✅ Brute Force Approach:
1️⃣ Iterate through the main string (haystack) – Start checking from each character if it matches the first character of needle.
2️⃣ Check substring match – Compare characters one by one to see if the full needle exists in haystack.
3️⃣ Return the index – If a match is found, return the starting index; otherwise, return -1.
4️⃣ Time Complexity: O(n * m) – where n is the length of haystack and m is the length of needle.
📌 What You’ll Learn:
✔️ Problem statement & examples
✔️ Step-by-step coding walkthrough
✔️ Time & space complexity analysis
✔️ Edge cases and brute force limitations
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