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Amazon LeetCode Problems

100 most frequently asked LeetCode problems in Amazon technical interviews

Difficulty breakdown: 19 Easy, 60 Medium, 21 Hard

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ProblemDiff
Identify the Largest Outlier in an Array
100%
M
→
Two Sum
86%
E
→
Task Scheduler
85%
M
→
Number of Islands
82%
M
→
LRU Cache
81%
M
→
Trapping Rain Water
74%
H
→
Minimum Array Sum
74%
M
→
Group Anagrams
72%
M
→
Reorganize String
72%
M
→
Design an Array Statistics Tracker
72%
H
→
Best Time to Buy and Sell Stock
69%
E
→
Analyze User Website Visit Pattern
69%
M
→
Merge k Sorted Lists
67%
H
→
Copy List with Random Pointer
67%
M
→
Top K Frequent Elements
67%
M
→
Valid Parentheses
64%
E
→
Merge Intervals
64%
M
→
Merge Sorted Array
64%
E
→
Kth Largest Element in an Array
64%
M
→
Basic Calculator II
64%
M
→
Minimum Difference in Sums After Removal of Elements
64%
H
→
3Sum
60%
M
→
Jump Game
60%
M
→
LFU Cache
60%
H
→
Subarray Sum Equals K
60%
M
→
Merge Strings Alternately
60%
E
→
Make String a Subsequence Using Cyclic Increments
60%
M
→
Median of Two Sorted Arrays
56%
H
→
Zigzag Conversion
56%
M
→
Letter Combinations of a Phone Number
56%
M
→
Minimum Window Substring
56%
H
→
Word Ladder
56%
H
→
Course Schedule
56%
M
→
Basic Calculator
56%
H
→
Coin Change
56%
M
→
All Nodes Distance K in Binary Tree
56%
M
→
Two Best Non-Overlapping Events
56%
M
→
Add Two Numbers
51%
M
→
Longest Palindromic Substring
51%
M
→
Palindrome Number
51%
E
→
Longest Common Prefix
51%
E
→
Remove Duplicates from Sorted Array
51%
E
→
Spiral Matrix
51%
M
→
Implement Queue using Stacks
51%
E
→
Meeting Rooms II
51%
M
→
Integer to English Words
51%
H
→
Insert Delete GetRandom O(1)
51%
M
→
First Unique Character in a String
51%
E
→
Flood Fill
51%
E
→
K Closest Points to Origin
51%
M
→
Rotting Oranges
51%
M
→
Capacity To Ship Packages Within D Days
51%
M
→
Lowest Common Ancestor of a Binary Tree III
51%
M
→
Create Hello World Function
51%
E
→
Longest Substring Without Repeating Characters
45%
M
→
Regular Expression Matching
45%
H
→
Generate Parentheses
45%
M
→
Find First and Last Position of Element in Sorted Array
45%
M
→
Maximum Subarray
45%
M
→
Largest Rectangle in Histogram
45%
H
→
Best Time to Buy and Sell Stock II
45%
M
→
Word Ladder II
45%
H
→
Reverse Words in a String
45%
M
→
Find Peak Element
45%
M
→
House Robber
45%
M
→
Palindrome Linked List
45%
E
→
Lowest Common Ancestor of a Binary Tree
45%
M
→
Product of Array Except Self
45%
M
→
Sliding Window Maximum
45%
H
→
Trips and Users
45%
H
→
Find Median from Data Stream
45%
H
→
Find K Pairs with Smallest Sums
45%
M
→
Koko Eating Bananas
45%
M
→
Subarrays with K Different Integers
45%
H
→
Maximum Profit in Job Scheduling
45%
H
→
Find Longest Self-Contained Substring
45%
H
→
Reverse Integer
36%
M
→
Integer to Roman
36%
M
→
Remove Nth Node From End of List
36%
M
→
Merge Two Sorted Lists
36%
E
→
Reverse Nodes in k-Group
36%
H
→
Find the Index of the First Occurrence in a String
36%
E
→
Search in Rotated Sorted Array
36%
M
→
Valid Sudoku
36%
M
→
Combination Sum
36%
M
→
Pow(x, n)
36%
M
→
Minimum Path Sum
36%
M
→
Climbing Stairs
36%
E
→
Word Search
36%
M
→
Remove Duplicates from Sorted Array II
36%
M
→
Binary Tree Zigzag Level Order Traversal
36%
M
→
Maximum Depth of Binary Tree
36%
E
→
Populating Next Right Pointers in Each Node
36%
M
→
Pascal's Triangle
36%
E
→
Longest Consecutive Sequence
36%
M
→
Gas Station
36%
M
→
Word Break
36%
M
→
Majority Element
36%
E
→
Best Time to Buy and Sell Stock IV
36%
H
→
Binary Tree Right Side View
36%
M
→