LeetCode 1 - Two Sum | Brute Force + Hash Map | C++ Solution

In this video, we solve LeetCode 1: Two Sum with a beginner-friendly explanation in C++. We will understand: ✅ Problem Explanation ✅ Brute Force Approach ✅ Optimal Hash Map Solution ✅ Step-by-Step Dry Run ✅ Time & Space Complexity ✅ Interview Tips and Logic Building 🔥 Topics Covered: Arrays Hash Map / Unordered Map Searching Time Complexity Optimization Interview Coding Patterns 💡 Problem Idea: Given an array of integers and a target value, find the indices of two numbers such that they add up to the target. Example: Input: nums = [2,7,11,15], target = 9 Output: [0,1] Because: 2 + 7 = 9 📌 Approaches Explained: Brute Force → Check all pairs → O(n²) Optimal Hash Map Solution → O(n) 💻 Language Used: C++ 📌 Problem Link: LeetCode 1 - Two Sum #leetcode #twosum #cpp #hashmap #arrays #dsa #codinginterview #competitiveprogramming #leetcodeeasy #cplusplustutorial #programming #interviewpreparation #datastructures