Vis
Code
Graph
BFS, DFS, topological sort, union-find.
133.
Clone Graph
Medium
207.
Course Schedule
Medium
417.
Pacific Atlantic Water Flow
Medium
200.
Number of Islands
Medium
128.
Longest Consecutive Sequence
Medium
269.
Alien Dictionary
Premium
Hard
261.
Graph Valid Tree
Premium
Medium
323.
Number of Connected Components in an Undirected Graph
Premium
Medium
733.
Flood Fill
Easy
542.
01 Matrix
Medium
994.
Rotting Oranges
Medium
721.
Accounts Merge
Medium
310.
Minimum Height Trees
Medium
127.
Word Ladder
Hard
695.
Max Area of Island
Medium
130.
Surrounded Regions
Medium
286.
Walls and Gates
Premium
Medium
210.
Course Schedule II
Medium
684.
Redundant Connection
Medium
332.
Reconstruct Itinerary
Hard
1584.
Min Cost to Connect All Points
Medium
743.
Network Delay Time
Medium
778.
Swim in Rising Water
Hard
787.
Cheapest Flights Within K Stops
Medium
329.
Longest Increasing Path in a Matrix
Hard