Construct String With Repeat Limit | 2 Simple Approaches | Leetcode 2182 | codestorywithMIK
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This is the 54th Video of our Playlist "Stringa : Popular Interview Problems" by codestorywithMIK
In this video we will try to solve an normal problem based on string + greedy + heap : Construct String With Repeat Limit | 2 Simple Approaches | Leetcode 2182 | 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 : Construct String With Repeat Limit | 2 Simple Approaches | Leetcode 2182 | codestorywithMIK
Company Tags : will update later
My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/strings/Construct String With Repeat Limit.cpp
Leetcode Link : https://leetcode.com/problems/construct-string-with-repeat-limit
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Summary :
First Approach - Greedy with Frequency Array
Key Idea: Use a frequency array to keep track of character counts and process characters in descending order (starting from 'z').
Steps:
Traverse the frequency array and append the largest character up to repeatLimit times.
If the current character has remaining occurrences, append the next largest character once to avoid violating the repeatLimit.
Second Approach - Max Heap (Priority Queue)
Key Idea: Use a max heap (priority queue) to always fetch the largest available character efficiently.
Steps:
Insert all distinct characters into a max heap based on their order.
Pop the largest character, append it up to repeatLimit times, and reinsert it into the heap if it still has remaining occurrences.
Append the next largest character if needed to avoid exceeding the repeatLimit.
✨ Timelines✨
00:00 - Introduction
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