Longest Subarray with Given Sum | Prefix Sum + HashMap | Python DSA for Placements
Автор: CodeWithJalandhar
Загружено: 2026-02-12
Просмотров: 38
Описание:
Longest Subarray with Given Sum is one of the most important prefix sum interview questions asked in placement coding rounds and online assessments.
In this video, we build on the previous problem Subarray Sum Equals K and go one level deeper. Instead of counting subarrays, we now find the longest subarray whose sum equals K.
We cover:
• Brute force idea
• Optimal O(n) solution
• Prefix sum logic
• Why we store first occurrence in hashmap
• Full dry run
• Clean Python code
• Interview explanation
This playlist is designed for placement preparation using Python DSA, explained step by step in a beginner-friendly way.
Watch the full playlist in order to master array interview patterns.
learn fast code smart.
#dsa #python #placements #codinginterview #prefixsum #hashmap #arrays #dsapython #interviewprep #learnfastcodesmart
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