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Quick Summary
Replace all instances of one value with another to group identical numbers together.
Minimize operations until every distinct value occupies a single contiguous segment.
Leverage connectivity logic to determine how many merges are required.
What This Tests
Graph connectivity and component merging
Disjoint Set Union data structure application
Array preprocessing and interval analysis
Deriving optimal operation counts from connected components
Common Patterns
Union Find
Hashing
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Hint 1
Hint 2
Hint 3
What Interviewers May Ask Next
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Acceptance Rate
50.2%
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arr =
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