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Microsoft
Hash Table

Hash Table

Overall Progress0/79(0%)

Easy

1/22

Medium

0/45

Hard

0/12

Easy

Longest Substring Without Repeating Characters

Medium

Subarray Sum Equals K

Medium

Medium

Longest Consecutive Sequence

Medium

Majority Element

Easy

Medium

Letter Combinations of a Phone Number

Medium

Minimum Window Substring

Hard

Top K Frequent Elements

Medium

Medium

First Missing Positive

Hard

Linked List Cycle

Easy

Construct Binary Tree from Preorder and Inorder Traversal

Medium

Intersection of Two Linked Lists

Easy

Roman to Integer

Easy

Set Matrix Zeroes

Medium

Copy List with Random Pointer

Medium

Linked List Cycle II

Medium

Easy

Easy

Find All Anagrams in a String

Medium

Contains Duplicate

Easy

Hard

Permutation in String

Medium

Implement Trie (Prefix Tree)

Medium

Medium

Find All Duplicates in an Array

Medium

Medium

Insert Delete GetRandom O(1)

Medium

First Unique Character in a String

Easy

Reorganize String

Medium

Next Greater Element I

Easy

Construct Binary Tree from Inorder and Postorder Traversal

Medium

Vertical Order Traversal of a Binary Tree

Hard

Intersection of Two Arrays II

Easy

Top K Frequent Words

Medium

Integer to Roman

Medium

Hard

Medium

Two Sum IV - Input is a BST

Easy

Hard

Hard

Number of Good Pairs

Easy

Easy

Easy

Minimum Deletions to Make Character Frequencies Unique

Medium

Time Based Key-Value Store

Medium

Maximum Frequency Stack

Hard

Medium

Find and Replace Pattern

Medium

Number of Substrings Containing All Three Characters

Medium

Longest Substring with At Most K Distinct Characters

Medium

Minimum Number of Steps to Make Two Strings Anagram

Medium

Letter Tile Possibilities

Medium

Find the Longest Substring Containing Vowels in Even Counts

Medium

Number of Distinct Islands

Medium

Count Unique Characters of All Substrings of a Given String

Hard

Employee Importance

Medium

Design Tic-Tac-Toe

Medium

Maximum Size Subarray Sum Equals k

Medium

Encode and Decode TinyURL

Medium

Number of Atoms

Hard

Maximum Number of Balloons

Easy

Logger Rate Limiter

Easy

Distribute Candies

Easy

Design In-Memory File System

Hard

Lowest Common Ancestor of a Binary Tree III

Medium

Longest Nice Substring

Easy

Find Lucky Integer in an Array

Easy

Count Substrings That Differ by One Character

Medium

Palindrome Permutation

Easy

Rearrange String k Distance Apart

Hard

Design Snake Game

Medium

Palindrome Permutation II

Medium

Strobogrammatic Number

Easy

First Unique Number

Medium

Making File Names Unique

Medium

Medium

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