LeetCode 401 | Binary Watch | Daily LeetCode | Day 48/365 | Backtracking / Bit Manipulation | C++ скачать в хорошем качестве

LeetCode 401 | Binary Watch | Daily LeetCode | Day 48/365 | Backtracking / Bit Manipulation | C++

LeetCode 401 | Binary Watch | Daily LeetCode | Day 48/365 | Backtracking / Bit Manipulation | C++ Solution In this video, we solve LeetCode 401: Binary Watch, where a binary watch uses LEDs to represent hours and minutes. Given the number of LEDs that are ON, we must return all possible valid times. 🧠 Core Idea: • The watch has: • 4 LEDs for hours (0–11) • 6 LEDs for minutes (0–59) • Count the number of set bits • Generate all valid combinations • Use bit counting (builtin function) or backtracking We ensure: • Hour 12 • Minute 60 • Exactly turnedOn bits are set 📌 What you’ll learn in this video: • How binary representation maps to time • Counting set bits efficiently • Generating combinations smartly • Validating constraints carefully • Clean and interview-ready C++ implementation • Time & space complexity discussion ⏱ Time Complexity: O(1) (bounded by 12 × 60 possibilities) 💾 Space Complexity: O(1) 💻 Problem Link: https://leetcode.com/problems/binary-... 🎯 Why this problem matters: This problem strengthens your understanding of bit manipulation + combinatorics, commonly asked in interviews to test logical thinking. 👍 Like the video if bit problems are becoming fun 💬 Comment if you want a dry run example 🔔 Subscribe for the 365 Days of LeetCode Challenge #LeetCode #DailyLeetCode #Day48of365 #BitManipulation #Backtracking #Binary #CPlusPlus #DSA #InterviewPreparation