Problems

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

Title	Solution	Practice	Difficulty	Companies	Topics
3351. Sum of Good Subsequences	Solution	Solve	Hard	Google	Array Dynamic Programming+1
3352. Count K-Reducible Numbers Less Than N	Solution	Solve	Hard	Schneider Electric	Combinatorics Dynamic Programming+2
3353. Minimum Total Operations	Solution	Solve	Easy	-	Array
3354. Make Array Elements Equal to Zero	Solution	Solve	Easy	Amazon+4	Array Prefix Sum+1
3355. Zero Array Transformation I	Solution	Solve	Medium	Amazon+4	Array Prefix Sum
3356. Zero Array Transformation II	Solution	Solve	Medium	Amazon+3	Array Binary Search+1
3357. Minimize the Maximum Adjacent Element Difference	Solution	Solve	Hard	Amazon	Array Binary Search+1
3358. Books with NULL Ratings	Solution	Solve	Easy	-	Database
3359. Find Sorted Submatrices With Maximum Element at Most K	Solution	Solve	Hard	-	Array Matrix+2
3360. Stone Removal Game	Solution	Solve	Easy	-	Math Simulation
3361. Shift Distance Between Two Strings	Solution	Solve	Medium	Google	Array Prefix Sum+1
3362. Zero Array Transformation III	Solution	Solve	Medium	Amazon+4	Array Greedy+3
3363. Find the Maximum Number of Fruits Collected	Solution	Solve	Hard	Bloomberg+1	Array Dynamic Programming+1
3364. Minimum Positive Sum Subarray	Solution	Solve	Easy	Amazon	Array Prefix Sum+1
3365. Rearrange K Substrings to Form Target String	Solution	Solve	Medium	-	Hash Table Sorting+1
3366. Minimum Array Sum	Solution	Solve	Medium	Amazon+4	Array Dynamic Programming
3367. Maximize Sum of Weights after Edge Removals	Solution	Solve	Hard	Gameskraft	Depth-First Search Dynamic Programming+2
3368. First Letter Capitalization	Solution	Solve	Hard	-	Database
3369. Design an Array Statistics Tracker	Solution	Solve	Hard	Amazon	Binary Search Hash Table+1
3370. Smallest Number With All Set Bits	Solution	Solve	Easy	Amazon+2	Bit Manipulation Math
3371. Identify the Largest Outlier in an Array	Solution	Solve	Medium	Amazon+3	Array Counting+2
3372. Maximize the Number of Target Nodes After Connecting Trees I	Solution	Solve	Medium	Google+1	Breadth-First Search Depth-First Search+1
3373. Maximize the Number of Target Nodes After Connecting Trees II	Solution	Solve	Hard	Google+1	Breadth-First Search Depth-First Search+1
3374. First Letter Capitalization II	Solution	Solve	Hard	-	Database
3874. Valid Subarrays With Exactly One Peak	Solution	Solve	Medium	-
3865. Reverse K Subarrays	Solution	Solve	Medium	-	Array Two Pointers
3876. Construct Uniform Parity Array II	Solution	Solve	Medium	-	Array Math
3875. Construct Uniform Parity Array I	Solution	Solve	Easy	-	Array Math
3868. Minimum Cost to Equalize Arrays Using Swaps	Solution	Solve	Medium	-	Array Counting+2
3866. First Unique Even Element	Solution	Solve	Easy	-	Array Counting+1
3851. Maximum Requests Without Violating the Limit	Solution	Solve	Medium	-	Array Greedy+3
3873. Maximum Points Activated with One Addition	Solution	Solve	Hard	-	Array Hash Table+1
3871. Count Commas in Range II	Solution	Solve	Medium	-	Math
3861. Minimum Capacity Box	Solution	Solve	Easy	-	Array
3870. Count Commas in Range	Solution	Solve	Easy	-	Math
3867. Sum of GCD of Formed Pairs	Solution	Solve	Medium	-	Array Math+3
3860. Unique Email Groups	Solution	Solve	Medium	-	Array Hash Table+1
3862. Find the Smallest Balanced Index	Solution	Solve	Medium	-	Array Prefix Sum
3855. Sum of K-Digit Numbers in a Range	Solution	Solve	Hard	-	Combinatorics Divide and Conquer+2
3852. Smallest Pair With Different Frequencies	Solution	Solve	Easy	-	Array Counting+1
3872. Longest Arithmetic Sequence After Changing At Most One Element	Solution	Solve	Medium	-	Array Enumeration
3856. Trim Trailing Vowels	Solution	Solve	Easy	-	String
3837. Delayed Count of Equal Elements	Solution	Solve	Medium	-	Array Counting+1
3848. Check Digitorial Permutation	Solution	Solve	Medium	-	Counting Math
3847. Find the Score Difference in a Game	Solution	Solve	Medium	-	Array Simulation
3878. Count Good Subarrays	Solution	Solve	Hard	-	Array Bit Manipulation+2
3844. Longest Almost-Palindromic Substring	Solution	Solve	Medium	-	Dynamic Programming String+1
3863. Minimum Operations to Sort a String	Solution	Solve	Medium	-	String
3854. Minimum Operations to Make Array Parity Alternating	Solution	Solve	Medium	-	Array Greedy
3843. First Element with Unique Frequency	Solution	Solve	Medium	-	Array Counting+1