# Union Find

- [128     Longest Consecutive Sequence](/oj-practices/chapter1/union-find/128-longest-consecutive-sequence.md)
- [130     Surrounded Regions](/oj-practices/chapter1/union-find/130-surrounded-regions.md)
- [200     Number of Islands](/oj-practices/chapter1/union-find/200-number-of-islands.md)
- [261     Graph Valid Tree](/oj-practices/chapter1/union-find/261-graph-valid-tree.md)
- [305     Number of Islands II](/oj-practices/chapter1/union-find/305-number-of-islands-ii.md)
- [323     Number of Connected Components in an Undirected Graph](/oj-practices/chapter1/union-find/323-number-of-connected-components-in-an-undirected-graph.md)
- [399 Evaluate Division](/oj-practices/chapter1/union-find/399-evaluate-division.md)
- [547     Friend Circles](/oj-practices/chapter1/union-find/547-friend-circles.md)
- [684     Redundant Connection](/oj-practices/chapter1/union-find/684-redundant-connection.md)
- [685     Redundant Connection II](/oj-practices/chapter1/union-find/685-redundant-connection-ii.md)
- [695 Max Area of Island](/oj-practices/chapter1/union-find/695-max-area-of-island.md)
- [721     Accounts Merge](/oj-practices/chapter1/union-find/721-accounts-merge.md)
- [737     Sentence Similarity II](/oj-practices/chapter1/union-find/737-sentence-similarity-ii.md)
- [765     Couples Holding Hands](/oj-practices/chapter1/union-find/765-couples-holding-hands.md)
- [778     Swim in Rising Water](/oj-practices/chapter1/union-find/778-swim-in-rising-water.md)
- [803     Bricks Falling When Hit](/oj-practices/chapter1/union-find/803-bricks-falling-when-hit.md)
- [839     Similar String Groups](/oj-practices/chapter1/union-find/839-similar-string-groups.md)
- [924     Minimize Malware Spread](/oj-practices/chapter1/union-find/924-minimize-malware-spread.md)
- [928     Minimize Malware Spread II](/oj-practices/chapter1/union-find/928-minimize-malware-spread-ii.md)
- [947     Most Stones Removed with Same Row or Column](/oj-practices/chapter1/union-find/947-most-stones-removed-with-same-row-or-column.md)
- [952     Largest Component Size by Common Factor](/oj-practices/chapter1/union-find/952-largest-component-size-by-common-factor.md)
- [959 Regions Cut By Slashes](/oj-practices/chapter1/union-find/959-regions-cut-by-slashes.md)
