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Practice Problems
Reinforce Your Learning
Practice these breadth-first search problems to strengthen your understanding of BFS concepts.
Difficulty Levels:
EasyMediumHard
Filter by Difficulty:
Problem of the Day
Number of Islands
MediumCount the number of islands in a 2D grid.
Input: Example input
Output: Example output
All Problems
Shortest Path in Binary Matrix
BFS, Matrix
Word Ladder
BFS, String
Binary Tree Level Order Traversal
BFS, Tree
Binary Tree Zigzag Level Order Traversal
BFS, Tree
Number of Islands
BFS, DFS, Matrix
Walls and Gates
BFS, Matrix
Rotting Oranges
BFS, Matrix
Is Graph Bipartite?
BFS, Graph
Course Schedule
BFS, Graph, Topological Sort
Minimum Height Trees
BFS, Graph
Practice Makes Perfect
Solidify your understanding of breadth-first search by solving these carefully selected problems.
Breadth-First Search Problems
Filter by Difficulty:
Filter by Difficulty:
Shortest Path in Binary Matrix
BFS, Matrix
Word Ladder
BFS, String
Binary Tree Level Order Traversal
BFS, Tree
Binary Tree Zigzag Level Order Traversal
BFS, Tree
Number of Islands
BFS, DFS, Matrix
Walls and Gates
BFS, Matrix
Rotting Oranges
BFS, Matrix
Is Graph Bipartite?
BFS, Graph
Course Schedule
BFS, Graph, Topological Sort
Minimum Height Trees
BFS, Graph
Problem of the Day
Problem of the Day
Number of Islands
MediumCount the number of islands in a 2D grid.
Input: Example input
Output: Example output
Your Progress
Your Progress
Complete your first problem to start tracking progress
Easy
0/1
Medium
0/8
Hard
0/1
Total
0/10
Next Steps
After practicing breadth-first search problems, explore these related topics: