66. Plus One | LeetCode Easy | C++ Solution | Step-by-Step Explanation

Problem Name: 66. Plus One

In this video, I solved the LeetCode Easy problem “Plus One” using C++ with a beginner-friendly step-by-step explanation.

📌 Problem Statement:
You are given a large integer represented as an array of digits.

Each element in the array contains a single digit.

Your task is to add one to the number and return the resulting array.

📌 Approach Used:
- Traverse the array from right to left
- If current digit is less than 9:
- increment it
- return answer immediately
- If digit is 9:
- convert it into 0
- carry moves left
- If all digits are 9:
- insert 1 at beginning

📌 Examples Covered:
Input: [1,2,3]
Output: [1,2,4]

Input: [9,9,9]
Output: [1,0,0,0]

📌 Concepts Covered:
✅ Arrays
✅ Vectors
✅ Carry Handling
✅ Traversal
✅ STL insert()
✅ Edge Cases

📌 Time Complexity:
O(n)

📌 Space Complexity:
O(1)

📌 Language Used:
C++

📌 Features:
✅ Beginner Friendly
✅ Step-by-Step Explanation
✅ Dry Run Included
✅ Optimized Solution
✅ Interview Preparation

🔗 GitHub:
https://github.com/amankumar1508

🔗 LinkedIn:
/ aman-kumar-067825379

🔗 Portfolio:
https://aman-kumar-dev-portfolio.verc...

🔗 LeetCode Profile:
https://leetcode.com/u/OVzm6rcAP2/
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Видео 66. Plus One | LeetCode Easy | C++ Solution | Step-by-Step Explanation канала Aman Kumar