Clear Digits | 4 Detailed Approaches | Leetcode 3174 | codestorywithMIK
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Hi Everyone, this is the 69th video of our Playlist "Leetcode Easy".Now we will be solving an easy practice problem on Array - Clear Digits | 4 Detailed Approaches | Leetcode 3174 | codestorywithMIK
We will solve it using 3 Approaches and will see detailed dry runs to get more clarity.
Problem Name : Clear Digits | 4 Detailed Approaches | Leetcode 3174 | codestorywithMIK
Company Tags : will update later
My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Stack/Easy/Clear Digits.cpp
Leetcode Link : https://leetcode.com/problems/clear-digits/description/
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Video Summary :
Brute Force (Approach-1)
Iterate through the string and remove digits along with their preceding characters. Since erase() shifts elements left, we need to adjust the index accordingly.
Using Stack (Approach-2)
Intuition: Use a stack to store characters, pushing letters and popping when encountering digits.
Using Result String (Approach-3):
Instead of a stack, maintain a result string, appending letters and popping when encountering digits.
In-Place Solution (Approach-4)
Modify the string directly using two pointers—one for reading and one for writing.
Timelines
00:00 - Introduction
00:19 - Motivation
01:44 - Problem Explanation
03:09 - Approach-1 (Brute Force)
08:06 - Coding Approach-1
10:49 - Approach-2 (Using Stack)
13:37 - Approach-3 (without Stack)
15:35 - Coding Approach-2 and Approach-3
15:35 - Approach-4 (Inplace)
18:30 - Coding Approach-4
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