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Grind 75 questions

Customize your LeetCode study plan around your schedule. Work through the questions in order for a balanced progression.

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Questions summary

Time needed

64 hours

Fits into your schedule.

Difficulty

Easy: 24Medium: 42Hard: 9

Topics

Array: 11Binary: 1Binary Search: 5Binary Search Tree: 3Binary Tree: 9Dynamic Programming: 5Graph: 10Hash Table: 1Heap: 4Linked List: 5Matrix: 1Recursion: 3Stack: 7String: 8Trie: 2
Completed 0 / 75
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Week 1

0 / 13
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  1. 1
    Two Sum
    Easy15 min
  2. 2
    Valid Parentheses
    Easy20 min
  3. 3
    Merge Two Sorted Lists
    Easy20 min
  4. 4
    Best Time to Buy and Sell Stock
    Easy20 min
  5. 5
    Valid Palindrome
    Easy15 min
  6. 6
    Invert Binary Tree
    Easy15 min
  7. 7
    Valid Anagram
    Easy15 min
  8. 8
    Binary Search
    Easy15 min
  9. 9
    Flood Fill
    Easy20 min
  10. 10
    Lowest Common Ancestor of a Binary Search Tree
    Easy20 min
  11. 11
    Balanced Binary Tree
    Easy15 min
  12. 12
    Linked List Cycle
    Easy20 min
  13. 13
    Implement Queue using Stacks
    Easy20 min

Week 2

0 / 12
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  1. 1
    First Bad Version
    Easy20 min
  2. 2
    Ransom Note
    Easy15 min
  3. 3
    Climbing Stairs
    Easy20 min
  4. 4
    Longest Palindrome
    Easy20 min
  5. 5
    Reverse Linked List
    Easy20 min
  6. 6
    Majority Element
    Easy20 min
  7. 7
    Add Binary
    Easy15 min
  8. 8
    Diameter of Binary Tree
    Easy30 min
  9. 9
    Middle of the Linked List
    Easy20 min
  10. 10
    Maximum Depth of Binary Tree
    Easy15 min
  11. 11
    Contains Duplicate
    Easy15 min
  12. 12
    Maximum Subarray
    Medium20 min

Week 3

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  1. 1
    Insert Interval
    Medium25 min
  2. 2
    01 Matrix
    Medium30 min
  3. 3
    K Closest Points to Origin
    Medium30 min
  4. 4
    Longest Substring Without Repeating Characters
    Medium30 min
  5. 5
    3Sum
    Medium30 min
  6. 6
    Binary Tree Level Order Traversal
    Medium20 min
  7. 7
    Clone Graph
    Medium25 min
  8. 8
    Evaluate Reverse Polish Notation
    Medium30 min

Week 4

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  1. 1
    Course Schedule
    Medium30 min
  2. 2
    Implement Trie (Prefix Tree)
    Medium35 min
  3. 3
    Coin Change
    Medium25 min
  4. 4
    Product of Array Except Self
    Medium30 min
  5. 5
    Min Stack
    Medium20 min
  6. 6
    Validate Binary Search Tree
    Medium20 min
  7. 7
    Number of Islands
    Medium25 min
  8. 8
    Rotting Oranges
    Medium30 min

Week 5

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  1. 1
    Search in Rotated Sorted Array
    Medium30 min
  2. 2
    Combination Sum
    Medium30 min
  3. 3
    Permutations
    Medium30 min
  4. 4
    Merge Intervals
    Medium30 min
  5. 5
    Lowest Common Ancestor of a Binary Tree
    Medium25 min
  6. 6
    Time Based Key-Value Store
    Medium35 min
  7. 7
    Accounts Merge
    Medium30 min
  8. 8
    Sort Colors
    Medium25 min

Week 6

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  1. 1
    Word Break
    Medium30 min
  2. 2
    Partition Equal Subset Sum
    Medium30 min
  3. 3
    String to Integer (atoi)
    Medium25 min
  4. 4
    Spiral Matrix
    Medium25 min
  5. 5
    Subsets
    Medium30 min
  6. 6
    Binary Tree Right Side View
    Medium20 min
  7. 7
    Longest Palindromic Substring
    Medium25 min
  8. 8
    Unique Paths
    Medium20 min
  9. 9
    Construct Binary Tree from Preorder and Inorder Traversal
    Medium25 min

Week 7

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  1. 1
    Container With Most Water
    Medium35 min
  2. 2
    Letter Combinations of a Phone Number
    Medium30 min
  3. 3
    Word Search
    Medium30 min
  4. 4
    Find All Anagrams in a String
    Medium30 min
  5. 5
    Minimum Height Trees
    Medium30 min
  6. 6
    Task Scheduler
    Medium35 min
  7. 7
    LRU Cache
    Medium30 min

Week 8

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  1. 1
    Kth Smallest Element in a BST
    Medium25 min
  2. 2
    Minimum Window Substring
    Hard30 min
  3. 3
    Serialize and Deserialize Binary Tree
    Hard40 min
  4. 4
    Trapping Rain Water
    Hard35 min
  5. 5
    Find Median from Data Stream
    Hard30 min
  6. 6
    Word Ladder
    Hard45 min
  7. 7
    Basic Calculator
    Hard40 min
  8. 8
    Maximum Profit in Job Scheduling
    Hard45 min
  9. 9
    Merge k Sorted Lists
    Hard30 min
  10. 10
    Largest Rectangle in Histogram
    Hard35 min