Practice Problems

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115 Problems
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Is Subsequence
String Two Pointers
Easy
68.2%
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FizzBuzz
Math Simulation String
Easy
66.0%
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Majority Element
Array Hash Table
Easy
64.2%
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Find the Balance Index
Array Prefix Sum
Easy
61.3%
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Running Sum of an Array
Array Prefix Sum
Easy
61.8%
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Longest Increasing Subsequence
Array Binary Search Dynamic Programming
Medium
70.4%
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Capacity to Ship Packages Within D Days
Array Binary Search
Medium
48.7%
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Koko Eating Bananas
Array Binary Search
Medium
59.5%
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Excel Sheet Column Number
Math String
Medium
49.4%
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Longest Common Prefix
String
Medium
56.2%
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Reverse Words in a String
String Two Pointers
Medium
46.5%
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Rotate Array
Array Math Two Pointers
Medium
41.4%
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Best Time to Buy and Sell Stock II
Array Dynamic Programming
Medium
41.3%
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Merge Sorted Array
Array Sorting Two Pointers
Medium
47.6%
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Two Sum II - Input Array Is Sorted
Array Binary Search Two Pointers
Medium
53.6%
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Word Ladder
Breadth-First Search Hash Table String
Hard
70.0%
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N-Queens
Array Backtracking
Hard
60.0%
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First Missing Positive
Array Hash Table
Hard
57.7%
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Sliding Window Maximum
Array Heap (Priority Queue) Sliding Window
Hard
66.7%
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Largest Rectangle in Histogram
Array Stack
Hard
100.0%
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