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
1876. Substrings of Size Three with Distinct Characters	Solve	Easy	Quora	Counting Hash Table+2
1893. Check if All the Integers in a Range Are Covered	Solve	Easy	Bloomberg	Array Hash Table+1
1897. Redistribute Characters to Make All Strings Equal	Solve	Easy	Moengage	Counting Hash Table+1
1906. Minimum Absolute Difference Queries	Solve	Medium	Google	Array Hash Table
1912. Design Movie Rental System	Solve	Hard	Flipkart	Array Design+3
1915. Number of Wonderful Substrings	Solve	Medium	DE Shaw+1	Bit Manipulation Hash Table+2
1930. Unique Length-3 Palindromic Subsequences	Solve	Medium	Adobe+1	Bit Manipulation Hash Table+2
1932. Merge BSTs to Create Single BST	Solve	Hard	-	Binary Search Binary Tree+3
1935. Maximum Number of Words You Can Type	Solve	Easy	Quora	Hash Table String
1938. Maximum Genetic Difference Query	Solve	Hard	Media.Net	Array Bit Manipulation+3
1940. Longest Common Subsequence Between Sorted Arrays	Solve	Medium	Google	Array Counting+1
1941. Check if All Characters Have Equal Number of Occurrences	Solve	Easy	Bolt	Counting Hash Table+1
1942. The Number of the Smallest Unoccupied Chair	Solve	Medium	Amazon	Array Hash Table+1
1943. Describe the Painting	Solve	Medium	Google	Array Hash Table+2
1948. Delete Duplicate Folders in System	Solve	Hard	Booking.com+1	Array Hash Function+3
1980. Find Unique Binary String	Solve	Medium	Amazon	Array Backtracking+2
1983. Widest Pair of Indices With Equal Range Sum	Solve	Medium	Microsoft	Array Hash Table+1
1993. Operations on Tree	Solve	Medium	Google+1	Array Breadth-First Search+4
1995. Count Special Quadruplets	Solve	Easy	-	Array Enumeration+1
2001. Number of Pairs of Interchangeable Rectangles	Solve	Medium	-	Array Counting+3
2006. Count Number of Pairs With Absolute Difference K	Solve	Easy	Amazon	Array Counting+1
2007. Find Original Array From Doubled Array	Solve	Medium	Google+1	Array Greedy+2
2008. Maximum Earnings From Taxi	Solve	Medium	Apple+2	Array Binary Search+3
2009. Minimum Number of Operations to Make Array Continuous	Solve	Hard	Amazon+3	Array Binary Search+2
2013. Detect Squares	Solve	Medium	Amazon+1	Array Counting+2
2023. Number of Pairs of Strings With Concatenation Equal to Target	Solve	Medium	Facebook	Array Counting+2
2025. Maximum Number of Ways to Partition an Array	Solve	Hard	Google	Array Counting+3
2032. Two Out of Three	Solve	Easy	Booking.com	Array Bit Manipulation+1
2034. Stock Price Fluctuation	Solve	Medium	Google	Data Stream Design+3
2043. Simple Bank System	Solve	Medium	PhonePe	Array Design+2
2053. Kth Distinct String in an Array	Solve	Easy	Amazon	Array Counting+2
2062. Count Vowel Substrings of a String	Solve	Easy	Commvault	Hash Table String
2068. Check Whether Two Strings are Almost Equivalent	Solve	Easy	Salesforce	Counting Hash Table+1
2080. Range Frequency Queries	Solve	Medium	Quora	Array Binary Search+3
2083. Substrings That Begin and End With the Same Letter	Solve	Medium	-	Counting Hash Table+3
2085. Count Common Words With One Occurrence	Solve	Easy	Jane Street	Array Counting+2
2094. Finding 3-Digit Even Numbers	Solve	Easy	-	Array Enumeration+2
2099. Find Subsequence of Length K With the Largest Sum	Solve	Easy	Accenture	Array Hash Table+2
2103. Rings and Rods	Solve	Easy	Google	Hash Table String
2107. Number of Unique Flavors After Sharing K Candies	Solve	Medium	Microsoft	Array Hash Table+1
2115. Find All Possible Recipes from Given Supplies	Solve	Medium	Amazon+5	Array Graph+3
2121. Intervals Between Identical Elements	Solve	Medium	TuSimple+1	Array Hash Table+1
2122. Recover the Original Array	Solve	Hard	Google	Array Enumeration+3
2131. Longest Palindrome by Concatenating Two Letter Words	Solve	Medium	Amazon+3	Array Counting+3
2133. Check if Every Row and Column Contains All Numbers	Solve	Easy	Instacart+1	Array Hash Table+1
2135. Count Words Obtained After Adding a Letter	Solve	Medium	Amazon+1	Array Bit Manipulation+3
2150. Find All Lonely Numbers in the Array	Solve	Medium	Google	Array Counting+1
2152. Minimum Number of Lines to Cover Points	Solve	Medium	Morgan Stanely	Array Backtracking+6
2154. Keep Multiplying Found Values by Two	Solve	Easy	Goldman Sachs	Array Hash Table+2
2166. Design Bitset	Solve	Medium	Bloomberg	Array Design+2