LeetCode 75 C++ | Step-by-Step Solutions (LAN Academy) - LeetCode 374 – Guess Number Higher or Lower | Binary Search in C++

In this video we solve LeetCode 374 – Guess Number Higher or Lower using an efficient binary search solution in C++. We’re given an API int guess(int num) that tells us if our guess is higher, lower, or equal to the hidden number. Our goal is to find the number in O(log n) time. 🔍 What you’ll learn in this video How to apply binary search when you only get feedback “higher / lower / equal” How to avoid overflow when computing the middle point How to write a clean and readable solution in C++ Time and space complexity analysis 🧠 Problem summary We play a guessing game on numbers from 1 to n We call guess(num) and we get: -1 → our guess is too high 1 → our guess is too low 0 → correct number ✅ We must return the number that was picked. This is a perfect example of how binary search works in practice. ⏱️ Complexity Time: O(log n) – we cut the search interval in half each time Space: O(1) – we only use a few extra variables 📌 Useful for LeetCode beginners learning binary search patterns Students preparing for coding interviews (FAANG / Big Tech) Anyone following a LeetCode 75 / binary search playlist and wants solid explanations If you find this helpful, don’t forget to: 👍 Like the video 📝 Leave a comment with another problem you want to see 🔔 Subscribe for more step-by-step LeetCode and C++ explanations #leetcode #LeetCode374 #BinarySearch #CodingInterview #CPlusPlus #DSA #Algorithms #InterviewPrep #GuessNumberHigherOrLower #leetcode #leetcodecoding #leetcodesolution #leetcodechallenge #faang #fang #computerscience #cs #codingtiktok #coding #codinglife #boostofhope #fyp #codinginterview #softwareengineer #swe #tech #foryou #python #learntocode #google #techtok #programming #algorithms @reper #foryou #viral #reper #urmaritori #for