Problems

3,898+ problems · 938 Easy · 2039 Medium · 921 Hard

Title	Solution	Practice	Difficulty	Companies	Topics
3662. Filter Characters by Frequency	Solution	Solve	Easy	Opentext	Counting Hash Table+1
3698. Split Array With Minimum Difference	Solution	Solve	Medium	Google	Array Prefix Sum
3853. Merge Close Characters	Solution	Solve	Medium	-	Hash Table String
3683. Earliest Time to Finish One Task	Solution	Solve	Easy	-	Array
3678. Smallest Absent Positive Greater Than Average	Solution	Solve	Easy	-	Array Hash Table
3695. Maximize Alternating Sum Using Swaps	Solution	Solve	Hard	Google	Array Greedy+2
3688. Bitwise OR of Even Numbers in an Array	Solution	Solve	Easy	Meta+1	Array Bit Manipulation+1
3668. Restore Finishing Order	Solution	Solve	Easy	-	Array Hash Table
3691. Maximum Total Subarray Value II	Solution	Solve	Hard	-	Array Greedy+2
3656. Determine if a Simple Graph Exists	Solution	Solve	Medium	-	Array Binary Search+3
3689. Maximum Total Subarray Value I	Solution	Solve	Medium	-	Array Greedy
3708. Longest Fibonacci Subarray	Solution	Solve	Medium	-	Array
3859. Count Subarrays With K Distinct Integers	Solution	Solve	Hard	-	Array Counting+2
3676. Count Bowl Subarrays	Solution	Solve	Medium	Amazon+1	Array Monotonic Stack+1
3675. Minimum Operations to Transform String	Solution	Solve	Medium	-	Greedy String
3674. Minimum Operations to Equalize Array	Solution	Solve	Easy	-	Array Bit Manipulation+1
3684. Maximize Sum of At Most K Distinct Elements	Solution	Solve	Easy	-	Array Greedy+2
3658. GCD of Odd and Even Sums	Solution	Solve	Easy	Bloomberg+1	Math Number Theory
3663. Find The Least Frequent Digit	Solution	Solve	Easy	Flipkart	Array Counting+2
3641. Longest Semi-Repeating Subarray	Solution	Solve	Medium	-	Array Hash Table+1
3680. Generate Schedule	Solution	Solve	Medium	-	Array Greedy+1
3681. Maximum XOR of Subsequences	Solution	Solve	Hard	-	Array Bit Manipulation+2
3671. Sum of Beautiful Subsequences	Solution	Solve	Hard	Google+1	Array Binary Indexed Tree+2
3647. Maximum Weight in Two Bags	Solution	Solve	Medium	-	Array Dynamic Programming
3742. Maximum Path Score in a Grid	Solution	Solve	Medium	-	Array Dynamic Programming+1
3666. Minimum Operations to Equalize Binary String	Solution	Solve	Hard	Amazon	Breadth-First Search Math+3
3661. Maximum Walls Destroyed by Robots	Solution	Solve	Hard	Infosys	Array Binary Search+2
3660. Jump Game IX	Solution	Solve	Medium	Medianet	Array Dynamic Programming
3652. Best Time to Buy and Sell Stock using Strategy	Solution	Solve	Medium	Amazon+4	Array Prefix Sum+1
3659. Partition Array Into K-Distinct Groups	Solution	Solve	Medium	Google	Array Counting+1
3655. XOR After Range Multiplication Queries II	Solution	Solve	Hard	Infosys	Array Divide and Conquer
3653. XOR After Range Multiplication Queries I	Solution	Solve	Medium	Infosys	Array Divide and Conquer+1
3643. Flip Square Submatrix Vertically	Solution	Solve	Easy	-	Array Matrix+1
3631. Sort Threats by Severity and Exploitability	Solution	Solve	Medium	-	Array Sorting
3635. Earliest Finish Time for Land and Water Rides II	Solution	Solve	Medium	-	Array Binary Search+3
3654. Minimum Sum After Divisible Sum Deletions	Solution	Solve	Medium	-	Array Dynamic Programming+2
3633. Earliest Finish Time for Land and Water Rides I	Solution	Solve	Easy	-	Array Binary Search+3
3700. Number of ZigZag Arrays II	Solution	Solve	Hard	-	Dynamic Programming Math
3649. Number of Perfect Pairs	Solution	Solve	Medium	Atlassian+4	Array Math+2
3699. Number of ZigZag Arrays I	Solution	Solve	Hard	-	Dynamic Programming Prefix Sum
3616. Number of Student Replacements	Solution	Solve	Medium	-	Array Simulation
3645. Maximum Total from Optimal Activation Order	Solution	Solve	Medium	Amazon+1	Array Greedy+3
3634. Minimum Removals to Balance Array	Solution	Solve	Medium	Amazon+2	Array Binary Search+2
3715. Sum of Perfect Square Ancestors	Solution	Solve	Hard	Amazon+2	Array Counting+5
3640. Trionic Array II	Solution	Solve	Hard	Amazon+5	Array Dynamic Programming
3636. Threshold Majority Queries	Solution	Solve	Hard	Adobe+3	Array Binary Search+4
3638. Maximum Balanced Shipments	Solution	Solve	Medium	Amazon	Array Dynamic Programming+3
3679. Minimum Discards to Balance Inventory	Solution	Solve	Medium	-	Array Counting+3
3637. Trionic Array I	Solution	Solve	Easy	Amazon+3	Array
3646. Next Special Palindrome Number	Solution	Solve	Hard	Google	Backtracking Bit Manipulation