LeetCode 219 – Contains Duplicate II | Java Solution
0:57
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LeetCode 219 – Contains Duplicate II | Java Solution
This video explains how to solve LeetCode problem 219, Contains Duplicate II, using Java. We check whether an array contains duplicate values within a given index distance k. The solution uses a HashMap (or a sliding window set) to achieve efficient performance. Includes problem explanation, approach breakdown, and Java code implementation.
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