Sequential Digits | 2 Approaches | Leetcode 1291
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This is the 81st Video of our Playlist "Array 1D-2D : Popular Interview Problems".
In this video we will try to solve a very good Array Enumeration problem - Sequential Digits | Leetcode 1291
I will explain the intuition so easily that you will never forget and start seeing this as cakewalk EASYYY.
We will do live coding after explanation and see if we are able to pass all the test cases.
Also, please note that my Github solution link below contains both C++ as well as JAVA code.
Problem Name : Sequential Digits | Leetcode 1291
Company Tags : AMAZON
My solutions on Github(C++ & JAVA) : https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Arrays/Sequential%20Digits.cpp
Leetcode Link : https://leetcode.com/problems/sequential-digits/
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My GitHub Repo for interview preparation : https://github.com/MAZHARMIK/Interview_DS_Algo
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Approach-1 Summary : The first approach utilizes a queue to generate sequential digits in a breadth-first manner. It starts by enqueueing digits from 1 to 8 and then iteratively dequeues a digit, checks if it falls within the given range, and adds it to the result vector. Additionally, it enqueues the next sequential digit formed by adding one to the last digit of the current dequeued number. This process continues until the queue is empty, and the result vector contains all sequential digits within the specified range.
Approach-2 Summary : The second approach uses a precomputed list of all possible sequential digits up to nine digits in length. It then iterates through this list, filtering out numbers that are below the given low value and above the high value. The result vector is populated with the filtered numbers.
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✨ Timelines✨
00:00 - Introduction
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