Using a Robot to Print the Lexicographically Smallest String | Thought Process | Leetcode 2434 | MIK
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Hi Everyone, this is the 62nd video of our Playlist "Strings : Popular Interview Problems".
Now we will be solving a good string based problem - Using a Robot to Print the Lexicographically Smallest String | Detailed Thought Process | Leetcode 2434 | codestorywithMIK
The video contains my detailed thought process and the WHY behind everything. It will become very easy after watching the thought process.
Problem Name : Using a Robot to Print the Lexicographically Smallest String | Detailed Thought Process | Leetcode 2434 | codestorywithMIK
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My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/strings/Using a Robot to Print the Lexicographically Smallest String.cpp
Leetcode Link : https://leetcode.com/problems/using-a-robot-to-print-the-lexicographically-smallest-string
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Video Summary :
The approach uses a greedy strategy to simulate a robot writing characters onto paper in the smallest possible lexicographic order. It precomputes the smallest character to the right of each position to decide when it's safe to write a character from a temporary stack. By pushing characters onto the stack and popping them only when they are less than or equal to the minimum upcoming character, it ensures optimal ordering. The remaining stack characters are appended at the end.
✨ Timelines✨
00:00 - Introduction
0:16 - Motivation
1:12 - Problem Explanation
3:27 - Thought Process
5:49 - Important Catch
13:29 - Preprocessing to find minCharToRight
19:55 - Story Points
21:11 - Coding it up
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