LeetCode
Автор: M CODE LEARNER
Загружено: 2025-12-15
Просмотров: 9
The Longest Consecutive Sequence (LeetCode #128) is a classic coding interview problem that tests your understanding of HashSet, time complexity, and array traversal.
In this video, we solve the problem using an O(n) time complexity approach by:
Storing elements in a HashSet for constant-time lookup
Identifying the start of a sequence (num - 1 not present)
Expanding the sequence until it breaks
Tracking the maximum consecutive length
🔹 Topics covered:
Longest Consecutive Sequence Java solution
O(n) optimized approach using HashSet
LeetCode 128 step-by-step explanation
Example walkthrough & edge cases
Interview-focused problem-solving strategy
This question is frequently asked in LeetCode, GFG practice, Coding Ninjas, and HackerRank interviews.
📌 Watch till the end to master this problem confidently.
#LongestConsecutiveSequence #LeetCode128 #Java #HashSet #DSA #CodingInterview #ProblemSolving #MCodeLearner
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