Dashboard Questions Topics Companies Sheets

Data Structures & Algorithms

Practice 3,374+ coding problems from top companies. Master DSA concepts and ace your interviews.

3,374

Problems

840

Easy

1762

Medium

772

Hard

Difficulty

All3374 Easy840 Medium1762 Hard772

Title	Solve	Difficulty	Companies	Topics
3301. Maximize the Total Height of Unique Towers	Solve	Medium	-	Array Greedy+1
3302. Find the Lexicographically Smallest Valid Sequence	Solve	Medium	-	Dynamic Programming Greedy+2
3303. Find the Occurrence of First Almost Equal Substring	Solve	Hard	-	String String Matching
3304. Find the K-th Character in String Game I	Solve	Easy	-	Bit Manipulation Math+2
3305. Count of Substrings Containing Every Vowel and K Consonants I	Solve	Medium	-	Hash Table Sliding Window+1
3306. Count of Substrings Containing Every Vowel and K Consonants II	Solve	Medium	-	Hash Table Sliding Window+1
3307. Find the K-th Character in String Game II	Solve	Hard	-	Bit Manipulation Math+1
3308. Find Top Performing Driver	Solve	Medium	-	Database
3309. Maximum Possible Number by Binary Concatenation	Solve	Medium	-	Array Bit Manipulation+1
3310. Remove Methods From Project	Solve	Medium	-	Breadth-First Search Depth-First Search+1
3311. Construct 2D Grid Matching Graph Layout	Solve	Hard	-	Array Graph+2
3312. Sorted GCD Pair Queries	Solve	Hard	-	Array Binary Search+6
3313. Find the Last Marked Nodes in Tree	Solve	Hard	-	Depth-First Search Tree
3314. Construct the Minimum Bitwise Array I	Solve	Easy	-	Array Bit Manipulation
3315. Construct the Minimum Bitwise Array II	Solve	Medium	-	Array Bit Manipulation
3316. Find Maximum Removals From Source String	Solve	Medium	-	Array Dynamic Programming+3
3317. Find the Number of Possible Ways for an Event	Solve	Hard	-	Combinatorics Dynamic Programming+1
3318. Find X-Sum of All K-Long Subarrays I	Solve	Easy	-	Array Hash Table+2
3319. K-th Largest Perfect Subtree Size in Binary Tree	Solve	Medium	-	Binary Tree Depth-First Search+2
3320. Count The Number of Winning Sequences	Solve	Hard	-	Dynamic Programming String
3321. Find X-Sum of All K-Long Subarrays II	Solve	Hard	-	Array Hash Table+2
3322. Premier League Table Ranking III	Solve	Medium	-	Database
3323. Minimize Connected Groups by Inserting Interval	Solve	Medium	-	Array Binary Search+2
3324. Find the Sequence of Strings Appeared on the Screen	Solve	Medium	-	Simulation String
3325. Count Substrings With K-Frequency Characters I	Solve	Medium	-	Hash Table Sliding Window+1
3326. Minimum Division Operations to Make Array Non Decreasing	Solve	Medium	-	Array Greedy+2
3327. Check if DFS Strings Are Palindromes	Solve	Hard	-	Array Depth-First Search+4
3328. Find Cities in Each State II	Solve	Medium	-	Database
3329. Count Substrings With K-Frequency Characters II	Solve	Hard	-	Hash Table Sliding Window+1
3330. Find the Original Typed String I	Solve	Easy	-	String
3331. Find Subtree Sizes After Changes	Solve	Medium	-	Array Depth-First Search+3
3332. Maximum Points Tourist Can Earn	Solve	Medium	-	Array Dynamic Programming+1
3333. Find the Original Typed String II	Solve	Hard	-	Dynamic Programming Prefix Sum+1
3334. Find the Maximum Factor Score of Array	Solve	Medium	-	Array Math+1
3335. Total Characters in String After Transformations I	Solve	Medium	-	Counting Dynamic Programming+3
3336. Find the Number of Subsequences With Equal GCD	Solve	Hard	-	Array Dynamic Programming+2
3337. Total Characters in String After Transformations II	Solve	Hard	-	Counting Dynamic Programming+3
3338. Second Highest Salary II	Solve	Medium	-	Database
3339. Find the Number of K-Even Arrays	Solve	Medium	-	Dynamic Programming
3340. Check Balanced String	Solve	Easy	-	String
3341. Find Minimum Time to Reach Last Room I	Solve	Medium	-	Array Graph+3
3342. Find Minimum Time to Reach Last Room II	Solve	Medium	-	Array Graph+3
3343. Count Number of Balanced Permutations	Solve	Hard	-	Combinatorics Dynamic Programming+2
3344. Maximum Sized Array	Solve	Medium	-	Binary Search Bit Manipulation
3345. Smallest Divisible Digit Product I	Solve	Easy	-	Enumeration Math
3346. Maximum Frequency of an Element After Performing Operations I	Solve	Medium	-	Array Binary Search+3
3347. Maximum Frequency of an Element After Performing Operations II	Solve	Hard	-	Array Binary Search+3
3348. Smallest Divisible Digit Product II	Solve	Hard	-	Backtracking Greedy+3
3349. Adjacent Increasing Subarrays Detection I	Solve	Easy	-	Array
3350. Adjacent Increasing Subarrays Detection II	Solve	Medium	-	Array Binary Search