First Completely Painted Row or Column | 3 Approaches | Detailed | Leetcode 2661 | codestorywithMIK
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Hi Everyone, this is the 136th video of our Playlist "Arrays 1D/2D : Popular Interview Problems".
Now we will be solving a good practice problem based on Array - First Completely Painted Row or Column | 3 Approaches | Brute Force | Better | Optimal | Leetcode 2661 | codestorywithMIK
Problem Name : First Completely Painted Row or Column | 3 Approaches | Brute Force | Better | Optimal | Leetcode 2661 | codestorywithMIK
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My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Arrays/2-D Array/First Completely Painted Row or Column.cpp
Leetcode Link : https://leetcode.com/problems/first-completely-painted-row-or-column/
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Video Summary :
Approach 1 (Brute Force):
Intuition: After painting each cell, check if the entire row or column is completely painted.
Thought Process: This approach uses nested loops to repeatedly check the state of rows and columns, leading to high time complexity due to redundant checks.
Approach 2 (Better Approach):
Intuition: Track the count of painted cells in each row and column to avoid redundant checks.
Thought Process: By maintaining separate counters for rows and columns, the algorithm efficiently determines when a row or column is fully painted.
Approach 3 (Best Approach):
Intuition: Precompute the last occurrence index for all cells in a row or column and determine the earliest completion.
Thought Process: This approach leverages a mapping of values to their indices in the array, enabling efficient computation of when a row or column is completely painted without iterative checks.
✨ Timelines✨
00:00 - Introduction
0:14 - Motivation
0:56 - Problem Explanation
3:19 - Brute Force Approach
8:32 - Better Approach
16:27 - Optimal Approach
28:26 - Coding Brute Force Approach
33:25 - Coding Better Approach
35:23 - Coding Optimal Approach
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