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Number of Islands

Try to solve the Number of Islands problem.

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Getting Started

Two Pointers

Two Pointers

Fast and Slow Pointers

Fast and Slow Pointers

Sliding Window

Sliding Window

Merge Intervals

In-Place Manipulation of a Linked List

Heaps

Heaps

K-way merge

Top K Elements

Modified Binary Search

Modified Binary Search

Subsets

Greedy Techniques

Backtracking

Dynamic Programming

Dynamic Programming

Cyclic Sort

Topological Sort

Topological Sort

Sort and Search

Matrices

Stacks

Graphs

Graphs

Tree Depth-First Search

Tree Breadth-First Search

Tree Breadth First Search

Trie

Hash Maps

Knowing What to Track

Union Find

Union Find

Custom Data Structures

Bitwise Manipulation

Math and Geometry

Challenge Yourself

Conclusion

Coding Patterns

Number of Islands

Statement