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Coding problems
Algorithm problems with tests in Python, JavaScript, Java, Go and C++, checked on our server.
Any difficulty
Easy
Medium
Hard
Array
1760
String
729
Hash Table
585
Dynamic Programming
558
Math
526
Sorting
432
Greedy
398
Binary Search
270
Depth-First Search
262
Matrix
239
Bit Manipulation
223
Breadth-First Search
207
Two Pointers
200
Prefix Sum
189
Tree
186
Heap (Priority Queue)
167
Simulation
163
Graph
152
43 more
Required and Spare Cables
Union Find · Graph · Minimum Spanning Tree
Hard
Split the Island
Depth-First Search · Breadth-First Search · Array
Hard
Repaint a Path in One Shade
Tree · Graph · Array
Hard
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