Problem Library

Master these coding challenges to ace your next technical interview. Handpicked problems with personalized spaced repetition.

All tracks Blind 75 NeetCode 150 NeetCode 250 Striver A to Z SDE Sheet

Showing 26-50 of 150 matching problems in NeetCode 150.

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All topics 0-1 Knapsack Algorithm X Array Backtracking Bidirectional Search Binary Lifting Binary Search Binary Search Tree Binary Tree Bit Manipulation Borůvka's Algorithm Bracket Sequences Breadth-First Search Brute-Force Search Bucket Sort Combinatorics Complete Knapsack Counting

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Array80Dynamic Programming35String33

These are the topics showing up most often in your current queue.

Title	Difficulty	Topics
49. Group Anagrams Open source	Medium	ArrayHash TableString+1 more
50. Pow(x, n)Open source	Medium	MathRecursion
51. N-Queens Open source	Hard	ArrayBacktrackingAlgorithm X
53. Maximum Subarray Open source	Medium	ArrayDivide and ConquerDynamic Programming
54. Spiral Matrix Open source	Medium	ArrayMatrixSimulation
55. Jump Game Open source	Medium	ArrayDynamic ProgrammingGreedy
56. Merge Intervals Open source	Medium	ArraySortingQuicksort
57. Insert Interval Open source	Medium	Array
62. Unique Paths Open source	Medium	MathDynamic ProgrammingCombinatorics
66. Plus One Open source	Easy	ArrayMath
70. Climbing Stairs Open source	Easy	MathDynamic ProgrammingMemoization
72. Edit Distance Open source	Medium	StringDynamic Programming
73. Set Matrix Zeroes Open source	Medium	ArrayHash TableMatrix
74. Search a 2D Matrix Open source	Medium	ArrayBinary SearchMatrix
76. Minimum Window Substring Open source	Hard	Hash TableStringSliding Window
78. Subsets Open source	Medium	ArrayBacktrackingBit Manipulation
79. Word Search Open source	Medium	ArrayStringBacktracking+2 more
84. Largest Rectangle in Histogram Open source	Hard	ArrayStackMonotonic Stack+1 more
90. Subsets II Open source	Medium	ArrayBacktrackingBit Manipulation
91. Decode Ways Open source	Medium	StringDynamic Programming
97. Interleaving String Open source	Medium	StringDynamic Programming
98. Validate Binary Search Tree Open source	Medium	TreeDepth-First SearchBinary Search Tree+1 more
100. Same Tree Open source	Easy	TreeDepth-First SearchBreadth-First Search+1 more
102. Binary Tree Level Order Traversal Open source	Medium	TreeBreadth-First SearchBinary Tree
104. Maximum Depth of Binary Tree Open source	Easy	TreeDepth-First SearchBreadth-First Search+1 more