Top Interview 150: Find First Occurrence Of A Substring In A String
Find first occurrence of substring in string efficiently using built-in indexOf() or manual sliding window approach with O(n-m+1)*m time complexity.
Top Interview 150 The problem asks us to find the first occurrence of a substring (needle) in a string (haystack) efficiently. Let’s break it down Find the Index of the First Occurrence in a String and solve it using multiple approaches, including a manual implementation. 🚀 Problem Description Given two strings needle and haystack: Return the index of the first occurrence of needle in haystack. Return -1 if needle does not exist in haystack. 💡 Examples Example 1 Input: haystack = "sadbutsad", needle = "sad" Output: 0 Explanation: "sad" appears first at index 0....