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
2960. Count Tested Devices After Test Operations	Solve	Easy	Accenture	Array Counting+1
2965. Find Missing and Repeated Values	Solve	Easy	-	Array Hash Table+2
2970. Count the Number of Incremovable Subarrays I	Solve	Easy	Apple	Array Binary Search+2
2974. Minimum Number Game	Solve	Easy	BT Group	Array Heap (Priority Queue)+2
2980. Check if Bitwise OR Has Trailing Zeros	Solve	Easy	Meituan	Array Bit Manipulation
2985. Calculate Compressed Mean	Solve	Easy	-	Database
2987. Find Expensive Cities	Solve	Easy	-	Database
2990. Loan Types	Solve	Easy	-	Database
2996. Smallest Missing Integer Greater Than Sequential Prefix Sum	Solve	Easy	-	Array Hash Table+1
3000. Maximum Area of Longest Diagonal Rectangle	Solve	Easy	-	Array
3005. Count Elements With Maximum Frequency	Solve	Easy	-	Array Counting+1
3010. Divide an Array Into Subarrays With Minimum Cost I	Solve	Easy	-	Array Enumeration+1
3014. Minimum Number of Pushes to Type Word I	Solve	Easy	-	Greedy Math+1
3019. Number of Changing Keys	Solve	Easy	-	String
3024. Type of Triangle	Solve	Easy	-	Array Math+1
3028. Ant on the Boundary	Solve	Easy	-	Array Prefix Sum+1
3032. Count Numbers With Unique Digits II	Solve	Easy	-	Dynamic Programming Hash Table+1
3033. Modify the Matrix	Solve	Easy	-	Array Matrix
3038. Maximum Number of Operations With the Same Score I	Solve	Easy	-	Array Simulation
3042. Count Prefix and Suffix Pairs I	Solve	Easy	-	Array Hash Function+4
3046. Split the Array	Solve	Easy	-	Array Counting+1
3051. Find Candidates for Data Scientist Position	Solve	Easy	-	Database
3053. Classifying Triangles by Lengths	Solve	Easy	-	Database
3059. Find All Unique Email Domains	Solve	Easy	-	Database
3062. Winner of the Linked List Game	Solve	Easy	-	Linked List
3063. Linked List Frequency	Solve	Easy	-	Counting Hash Table+1
3065. Minimum Operations to Exceed Threshold Value I	Solve	Easy	-	Array
3069. Distribute Elements Into Two Arrays I	Solve	Easy	-	Array Simulation
3074. Apple Redistribution into Boxes	Solve	Easy	-	Array Greedy+1
3079. Find the Sum of Encrypted Integers	Solve	Easy	-	Array Math
3083. Existence of a Substring in a String and Its Reverse	Solve	Easy	-	Hash Table String
3090. Maximum Length Substring With Two Occurrences	Solve	Easy	-	Hash Table Sliding Window+1
3095. Shortest Subarray With OR at Least K I	Solve	Easy	-	Array Bit Manipulation+1
3099. Harshad Number	Solve	Easy	-	Math
3105. Longest Strictly Increasing or Strictly Decreasing Subarray	Solve	Easy	-	Array
3110. Score of a String	Solve	Easy	-	String
3114. Latest Time You Can Obtain After Replacing Characters	Solve	Easy	-	Enumeration String
3120. Count the Number of Special Characters I	Solve	Easy	-	Hash Table String
3127. Make a Square with the Same Color	Solve	Easy	-	Array Enumeration+1
3131. Find the Integer Added to Array I	Solve	Easy	-	Array
3136. Valid Word	Solve	Easy	-	String
3142. Check if Grid Satisfies Conditions	Solve	Easy	-	Array Matrix
3146. Permutation Difference between Two Strings	Solve	Easy	-	Hash Table String
3150. Invalid Tweets II	Solve	Easy	-	Database
3151. Special Array I	Solve	Easy	-	Array
3158. Find the XOR of Numbers Which Appear Twice	Solve	Easy	-	Array Bit Manipulation+1
3162. Find the Number of Good Pairs I	Solve	Easy	-	Array Hash Table
3168. Minimum Number of Chairs in a Waiting Room	Solve	Easy	-	Simulation String
3172. Second Day Verification	Solve	Easy	-	Database
3173. Bitwise OR of Adjacent Elements	Solve	Easy	-	Array Bit Manipulation