Number of Ways to Divide a Long Corridor | Clear Intuition | Dry Run | Leetcode 2147
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This is the 30th Video of our String Playlist.
In this video we will try to solve a very normal medium string problem -Number of Ways to Divide a Long Corridor (Leetcode -2147).
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 : Number of Ways to Divide a Long Corridor
Company Tags : will soon update
My solutions on Github(C++ & JAVA) : https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/strings/Number%20of%20Ways%20to%20Divide%20a%20Long%20Corridor.cpp
Leetcode Link : https://leetcode.com/problems/number-of-ways-to-divide-a-long-corridor/
My DP Concepts Playlist : https://youtu.be/7eLMOE1jnls
My Graph Concepts Playlist : https://youtu.be/5JGiZnr6B5w
My GitHub Repo for interview preparation : https://github.com/MAZHARMIK/Interview_DS_Algo
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Approach Summary :
The approach first identifies the positions of seats and stores them in a vector. If the number of seats is odd or there are no seats at all, the function returns 0. The algorithm then iterates through every second pair of seats, calculating the distance between consecutive pairs and updating a running product. The final result is the product of these distances modulo 10^9 + 7. The use of modular arithmetic ensures the result does not exceed the specified modulo value.
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✨ Timelines✨
00:00 - Introduction
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