Problems

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

Active:HardPremium· 175 results

Title	Solution	Practice	Difficulty	Companies	Topics
3214. Year on Year Growth Rate	Solution	Solve	Hard	Amazon	Database
3231. Minimum Number of Increasing Subsequence to Be Removed	Solution	Solve	Hard	-	Array Binary Search
3236. CEO Subordinate Hierarchy	Solution	Solve	Hard	-	Database
3268. Find Overlapping Shifts II	Solution	Solve	Hard	-	Database
3269. Constructing Two Increasing Arrays	Solution	Solve	Hard	-	Array Dynamic Programming
3279. Maximum Total Area Occupied by Pistons	Solution	Solve	Hard	-	Array Counting+4
3299. Sum of Consecutive Subsequences	Solution	Solve	Hard	-	Array Dynamic Programming+1
3313. Find the Last Marked Nodes in Tree	Solution	Solve	Hard	Salesforce	Depth-First Search Tree
3329. Count Substrings With K-Frequency Characters II	Solution	Solve	Hard	-	Hash Table Sliding Window+1
3359. Find Sorted Submatrices With Maximum Element at Most K	Solution	Solve	Hard	-	Array Matrix+2
3368. First Letter Capitalization	Solution	Solve	Hard	-	Database
3369. Design an Array Statistics Tracker	Solution	Solve	Hard	Amazon	Binary Search Hash Table+1
3749. Evaluate Valid Expressions	Solution	Solve	Hard	-	Divide and Conquer Hash Table+3
3802. Number of Ways to Paint Sheets	Solution	Solve	Hard	-
3735. Lexicographically Smallest String After Reverse II	Solution	Solve	Hard	-	Binary Search Hash Function+3
3632. Subarrays with XOR at Least K	Solution	Solve	Hard	-	Array Bit Manipulation+2
3549. Multiply Two Polynomials	Solution	Solve	Hard	-	Array Math
3526. Range XOR Queries with Subarray Reversals	Solution	Solve	Hard	-	Array Binary Tree+1
3506. Find Time Required to Eliminate Bacterial Strains	Solution	Solve	Hard	-	Array Greedy+2
3416. Subsequences with a Unique Middle Mode II	Solution	Solve	Hard	-	Array Combinatorics+2
3406. Find the Lexicographically Largest String From the Box II	Solution	Solve	Hard	-	String Two Pointers
3383. Minimum Runes to Add to Cast Spell	Solution	Solve	Hard	De Shaw	Array Breadth-First Search+4
3385. Minimum Time to Break Locks II	Solution	Solve	Hard	Ivp	Array Depth-First Search+1
3888. Minimum Operations to Make All Grid Elements Equal	Solution	Solve	Hard	-
3916. Number of ZigZag Arrays III	Solution	Solve	Hard	-