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Isomorphic Strings

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May 14, 2026
4:13

In this video, I solved the LeetCode problem "Isomorphic Strings" using Hash Maps. Problem: Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if: * Characters in s can be replaced to get t * Each character maps to exactly one character * No two characters map to the same character Approach: We use two hash maps: * One map for s → t mapping * One map for t → s mapping Steps: * Traverse both strings together * Check if the current mapping already exists * If mapping conflicts, return false * Otherwise, store the mapping Using two-way mapping ensures a valid one-to-one relationship. Time Complexity: O(n) Space Complexity: O(1) GitHub Link: https://github.com/Kumar-Aditya-DEV/Leetcode-Questions LeetCode Profile: https://leetcode.com/u/Aditya-Kumar-DEVP/ LinkedIn: https://www.linkedin.com/in/aditya-kumar-060ba6376/ Notes: * Uses Hash Maps * Important string mapping problem * Bidirectional mapping avoids conflicts * Frequently asked in interviews Language: C++ If this helped you, Like, Share and Subscribe for more coding content. #leetcode #cpp #dsa #coding #strings #hashmap

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Isomorphic Strings | NatokHD