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
2951. Find the Peaks	Solve	Easy	Accelya	Array Enumeration
2952. Minimum Number of Coins to be Added	Solve	Medium	Flipkart	Array Greedy+1
2953. Count Complete Substrings	Solve	Hard	Meesho	Hash Table Sliding Window+1
2954. Count the Number of Infection Sequences	Solve	Hard	SAP+1	Array Combinatorics+1
2955. Number of Same-End Substrings	Solve	Medium	Sprinklr	Array Counting+3
2956. Find Common Elements Between Two Arrays	Solve	Easy	Facebook	Array Hash Table
2957. Remove Adjacent Almost-Equal Characters	Solve	Medium	Salesforce	Dynamic Programming Greedy+1
2958. Length of Longest Subarray With at Most K Frequency	Solve	Medium	MakeMyTrip	Array Hash Table+1
2959. Number of Possible Sets of Closing Branches	Solve	Hard	Atlassian+2	Bit Manipulation Enumeration+3
2960. Count Tested Devices After Test Operations	Solve	Easy	Accenture	Array Counting+1
2961. Double Modular Exponentiation	Solve	Medium	Barclays	Array Math+1
2962. Count Subarrays Where Max Element Appears at Least K Times	Solve	Medium	Adobe	Array Sliding Window
2963. Count the Number of Good Partitions	Solve	Hard	Google	Array Combinatorics+2
2964. Number of Divisible Triplet Sums	Solve	Medium	IBM	Array Hash Table
2965. Find Missing and Repeated Values	Solve	Easy	-	Array Hash Table+2
2966. Divide Array Into Arrays With Max Difference	Solve	Medium	Google	Array Greedy+1
2967. Minimum Cost to Make Array Equalindromic	Solve	Medium	Google	Array Binary Search+3
2968. Apply Operations to Maximize Frequency Score	Solve	Hard	Deutsche Bank	Array Binary Search+3
2969. Minimum Number of Coins for Fruits II	Solve	Hard	-	Array Dynamic Programming+3
2970. Count the Number of Incremovable Subarrays I	Solve	Easy	Apple	Array Binary Search+2
2971. Find Polygon With the Largest Perimeter	Solve	Medium	Airtel+1	Array Greedy+2
2972. Count the Number of Incremovable Subarrays II	Solve	Hard	Apple	Array Binary Search+1
2973. Find Number of Coins to Place in Tree Nodes	Solve	Hard	Amazon+1	Depth-First Search Dynamic Programming+3
2974. Minimum Number Game	Solve	Easy	BT Group	Array Heap (Priority Queue)+2
2975. Maximum Square Area by Removing Fences From a Field	Solve	Medium	-	Array Enumeration+1
2976. Minimum Cost to Convert String I	Solve	Medium	Atlassian	Array Graph+2
2977. Minimum Cost to Convert String II	Solve	Hard	Atlassian	Array Dynamic Programming+4
2978. Symmetric Coordinates	Solve	Medium	-	Database
2979. Most Expensive Item That Can Not Be Bought	Solve	Medium	Amazon	Dynamic Programming Math+1
2980. Check if Bitwise OR Has Trailing Zeros	Solve	Easy	Meituan	Array Bit Manipulation
2981. Find Longest Special Substring That Occurs Thrice I	Solve	Medium	Google	Binary Search Counting+3
2982. Find Longest Special Substring That Occurs Thrice II	Solve	Medium	Google	Binary Search Counting+3
2983. Palindrome Rearrangement Queries	Solve	Hard	-	Hash Table Prefix Sum+1
2984. Find Peak Calling Hours for Each City	Solve	Medium	-	Database
2985. Calculate Compressed Mean	Solve	Easy	-	Database
2986. Find Third Transaction	Solve	Medium	-	Database
2987. Find Expensive Cities	Solve	Easy	-	Database
2988. Manager of the Largest Department	Solve	Medium	-	Database
2989. Class Performance	Solve	Medium	-	Database
2990. Loan Types	Solve	Easy	-	Database
2991. Top Three Wineries	Solve	Hard	-	Database
2992. Number of Self-Divisible Permutations	Solve	Medium	-	Array Backtracking+3
2993. Friday Purchases I	Solve	Medium	-	Database
2994. Friday Purchases II	Solve	Hard	-	Database
2995. Viewers Turned Streamers	Solve	Hard	-	Database
2996. Smallest Missing Integer Greater Than Sequential Prefix Sum	Solve	Easy	-	Array Hash Table+1
2997. Minimum Number of Operations to Make Array XOR Equal to K	Solve	Medium	-	Array Bit Manipulation
2998. Minimum Number of Operations to Make X and Y Equal	Solve	Medium	-	Breadth-First Search Dynamic Programming+1
2999. Count the Number of Powerful Integers	Solve	Hard	-	Dynamic Programming Math+1
3000. Maximum Area of Longest Diagonal Rectangle	Solve	Easy	-	Array