Crawler Log Folder | 2 Approaches | Dry Runs | Leetcode 1598 | codestorywithMIK
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This is the 48th Video of our Playlist "Leetcode Easy : Popular Interview Problems" by codestorywithMIK
In this video we will try to solve a good practice problem : Water Bottles | 2 Approaches | Dry Runs | Leetcode 1598 | codestorywithMIK
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 : Water Bottles | 2 Approaches | Dry Runs | Leetcode 1598 | codestorywithMIK
Company Tags : Google, and some other company Online Assessment problem with slight variation
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Leetcode Link : https://leetcode.com/problems/crawler...
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Summary :
Approach-1: Using Simple Simulation
Description: This approach uses a single integer variable depth to simulate the traversal of folders. The depth variable is incremented when entering a folder and decremented when moving up a directory ("../"), ensuring it doesn't go below zero. The "./" operations are ignored as they do not change the directory.
Time Complexity: O(n), where n is the number of operations. Each operation is processed once.
Space Complexity: O(1), as only a single integer variable is used regardless of the input size.
Approach-2: Using Stack for Simulation
Description: This approach uses a stack to simulate the traversal of folders. Each folder name is pushed onto the stack, and when encountering "../", the stack is popped if it's not empty. The "./" operations are ignored. The size of the stack at the end represents the current depth in the folder structure.
Time Complexity: O(n), where n is the number of operations. Each operation is processed once.
Space Complexity: O(n), as the stack can potentially grow up to the number of operations if no "../" commands are encountered.
Summary
Both approaches efficiently simulate the traversal of the folder structure based on the operations given. The first approach uses a single integer to keep track of the depth, resulting in constant space usage, making it more space-efficient. The second approach uses a stack, which is more intuitive in terms of simulating folder traversal but requires additional space proportional to the number of operations. Both have the same time complexity of O(n).
✨ Timelines✨
00:00 - Introduction
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