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Google LeetCode Problems

100 most frequently asked LeetCode problems in Google technical interviews

Difficulty breakdown: 33 Easy, 58 Medium, 9 Hard

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ProblemDiff
Two Sum
100%
E
→
Merge Strings Alternately
80%
E
→
Create Hello World Function
77%
E
→
Longest Substring Without Repeating Characters
73%
M
→
Add Two Numbers
71%
M
→
Merge Sorted Array
71%
E
→
Median of Two Sorted Arrays
67%
H
→
The Earliest Moment When Everyone Become Friends
67%
M
→
Zero Array Transformation I
67%
M
→
Zero Array Transformation III
67%
M
→
Merge Intervals
65%
M
→
Climbing Stairs
65%
E
→
Number of Islands
63%
M
→
Palindrome Number
60%
E
→
Maximum Subarray
60%
M
→
Move Pieces to Obtain a String
60%
M
→
Continuous Subarrays
60%
M
→
Maximum Beauty of an Array After Applying Operation
60%
M
→
Next Permutation
56%
M
→
Sqrt(x)
56%
E
→
Course Schedule
56%
M
→
Subarray Sum Equals K
56%
M
→
Recyclable and Low Fat Products
56%
E
→
Two Best Non-Overlapping Events
56%
M
→
Add Two Integers
56%
E
→
Letter Combinations of a Phone Number
53%
M
→
Valid Parentheses
53%
E
→
Generate Parentheses
53%
M
→
Remove Duplicates from Sorted Array
53%
E
→
Search Insert Position
53%
E
→
Flatten Binary Tree to Linked List
53%
M
→
Linked List Cycle
53%
E
→
Find Peak Element
53%
M
→
Construct String With Repeat Limit
53%
M
→
Zigzag Conversion
48%
M
→
Reverse Integer
48%
M
→
Longest Common Prefix
48%
E
→
Merge Two Sorted Lists
48%
E
→
Find the Index of the First Occurrence in a String
48%
E
→
Trapping Rain Water
48%
H
→
N-Queens
48%
H
→
Pascal's Triangle
48%
E
→
Best Time to Buy and Sell Stock
48%
E
→
LRU Cache
48%
M
→
Basic Calculator
48%
H
→
Palindrome Linked List
48%
E
→
Move Zeroes
48%
E
→
Find Median from Data Stream
48%
H
→
Minimum Area Rectangle
48%
M
→
Check If N and Its Double Exist
48%
E
→
Minimum Limit of Balls in a Bag
48%
M
→
Adding Spaces to a String
48%
M
→
Take Gifts From the Richest Pile
48%
E
→
Zero Array Transformation II
48%
M
→
Container With Most Water
42%
M
→
Integer to Roman
42%
M
→
Roman to Integer
42%
E
→
Find First and Last Position of Element in Sorted Array
42%
M
→
Permutations
42%
M
→
Rotate Image
42%
M
→
Jump Game
42%
M
→
Unique Paths
42%
M
→
Unique Paths II
42%
M
→
Plus One
42%
E
→
Sort Colors
42%
M
→
Single Number
42%
E
→
Majority Element
42%
E
→
Largest Number
42%
M
→
Isomorphic Strings
42%
E
→
Basic Calculator II
42%
M
→
Lowest Common Ancestor of a Binary Tree
42%
M
→
Missing Number
42%
E
→
Longest Increasing Subsequence
42%
M
→
Counting Bits
42%
E
→
Logger Rate Limiter
42%
E
→
Ransom Note
42%
E
→
Decode String
42%
M
→
Split Array Largest Sum
42%
H
→
Longest Repeating Character Replacement
42%
M
→
Coin Change II
42%
M
→
Daily Temperatures
42%
M
→
Reorganize String
42%
M
→
Koko Eating Bananas
42%
M
→
Reveal Cards In Increasing Order
42%
M
→
K Closest Points to Origin
42%
M
→
Longest Arithmetic Subsequence of Given Difference
42%
M
→
The kth Factor of n
42%
M
→
Frequency of the Most Frequent Element
42%
M
→
Minimum Time to Visit a Cell In a Grid
42%
H
→
Identify the Largest Outlier in an Array
42%
M
→
Maximum Area Rectangle With Point Constraints I
42%
M
→
Longest Palindromic Substring
33%
M
→
3Sum
33%
M
→
Remove Nth Node From End of List
33%
M
→
Merge k Sorted Lists
33%
H
→
Remove Element
33%
E
→
First Missing Positive
33%
H
→
Jump Game II
33%
M
→
Spiral Matrix
33%
M
→
Length of Last Word
33%
E
→