Dashboard Questions Topics Companies Sheets

Hash Table

Topic

645 coding problems covering Hash Table concepts. Master this topic and improve your problem-solving skills.

645

Problems

158

Easy

383

Medium

104

Hard

Difficulty

All645 Easy158 Medium383 Hard104

Title	Solve	Difficulty	Companies	Topics
1590. Make Sum Divisible by P	Solve	Medium	Amazon	Array Hash Table+1
1593. Split a String Into the Max Number of Unique Substrings	Solve	Medium	Amazon+1	Backtracking Hash Table+1
1600. Throne Inheritance	Solve	Medium	Google	Depth-First Search Design+2
1604. Alert Using Same Key-Card Three or More Times in a One Hour Period	Solve	Medium	Indeed+3	Array Hash Table+2
1612. Check If Two Expression Trees are Equivalent	Solve	Medium	Google	Binary Tree Counting+3
1624. Largest Substring Between Two Equal Characters	Solve	Easy	Google	Hash Table String
1630. Arithmetic Subarrays	Solve	Medium	Bloomberg+2	Array Hash Table+1
1636. Sort Array by Increasing Frequency	Solve	Easy	Amazon+4	Array Hash Table+1
1638. Count Substrings That Differ by One Character	Solve	Medium	Microsoft	Dynamic Programming Enumeration+2
1640. Check Array Formation Through Concatenation	Solve	Easy	Facebook	Array Hash Table
1647. Minimum Deletions to Make Character Frequencies Unique	Solve	Medium	Amazon+10	Greedy Hash Table+2
1650. Lowest Common Ancestor of a Binary Tree III	Solve	Medium	Amazon+6	Binary Tree Hash Table+2
1656. Design an Ordered Stream	Solve	Easy	Bloomberg	Array Data Stream+2
1657. Determine if Two Strings Are Close	Solve	Medium	Facebook+2	Counting Hash Table+2
1658. Minimum Operations to Reduce X to Zero	Solve	Medium	Adobe+3	Array Binary Search+3
1660. Correct a Binary Tree	Solve	Medium	Google	Binary Tree Breadth-First Search+3
1674. Minimum Moves to Make Array Complementary	Solve	Medium	CureFit	Array Hash Table+1
1676. Lowest Common Ancestor of a Binary Tree IV	Solve	Medium	Amazon	Binary Tree Depth-First Search+2
1679. Max Number of K-Sum Pairs	Solve	Medium	Amazon	Array Hash Table+2
1684. Count the Number of Consistent Strings	Solve	Easy	Amazon+1	Array Bit Manipulation+3
1695. Maximum Erasure Value	Solve	Medium	CashFree	Array Hash Table+1
1711. Count Good Meals	Solve	Medium	Adobe+2	Array Hash Table
1713. Minimum Operations to Make a Subsequence	Solve	Hard	Google	Array Binary Search+2
1726. Tuple with Same Product	Solve	Medium	Google	Array Counting+1
1733. Minimum Number of People to Teach	Solve	Medium	Duolingo	Array Greedy+1
1737. Change Minimum Characters to Satisfy One of Three Conditions	Solve	Medium	Google	Counting Hash Table+2
1740. Find Distance in a Binary Tree	Solve	Medium	Amazon+5	Binary Tree Breadth-First Search+3
1742. Maximum Number of Balls in a Box	Solve	Easy	AppDynamics+1	Counting Hash Table+1
1743. Restore the Array From Adjacent Pairs	Solve	Medium	Accenture+4	Array Depth-First Search+1
1748. Sum of Unique Elements	Solve	Easy	Facebook	Array Counting+1
1756. Design Most Recently Used Queue	Solve	Medium	Google	Array Binary Indexed Tree+4
1763. Longest Nice Substring	Solve	Easy	Microsoft	Bit Manipulation Divide and Conquer+3
1772. Sort Features by Popularity	Solve	Medium	Amazon	Array Hash Table+2
1775. Equal Sum Arrays With Minimum Number of Operations	Solve	Medium	HRT+1	Array Counting+2
1781. Sum of Beauty of All Substrings	Solve	Medium	Google	Counting Hash Table+1
1788. Maximize the Beauty of the Garden	Solve	Hard	Amazon	Array Greedy+2
1790. Check if One String Swap Can Make Strings Equal	Solve	Easy	Facebook	Counting Hash Table+1
1794. Count Pairs of Equal Substrings With Minimum Difference	Solve	Medium	Google	Greedy Hash Table+1
1796. Second Largest Digit in a String	Solve	Easy	Softwire	Hash Table String
1797. Design Authentication Manager	Solve	Medium	Twitter	Design Doubly-Linked List+2
1804. Implement Trie II (Prefix Tree)	Solve	Medium	Apple+1	Design Hash Table+2
1805. Number of Different Integers in a String	Solve	Easy	Expedia	Hash Table String
1807. Evaluate the Bracket Pairs of a String	Solve	Medium	Google	Array Hash Table+1
1814. Count Nice Pairs in an Array	Solve	Medium	Navi+2	Array Counting+2
1817. Finding the Users Active Minutes	Solve	Medium	Twitter	Array Hash Table
1832. Check if the Sentence Is Pangram	Solve	Easy	Facebook+1	Hash Table String
1836. Remove Duplicates From an Unsorted Linked List	Solve	Medium	Goldman Sachs+1	Hash Table Linked List
1852. Distinct Numbers in Each Subarray	Solve	Medium	Amazon	Array Hash Table+1
1857. Largest Color Value in a Directed Graph	Solve	Hard	Accolite+3	Counting Dynamic Programming+4
1865. Finding Pairs With a Certain Sum	Solve	Medium	Quora	Array Design+1