Problems

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

Active:Hard· 918 results

Title	Solution	Practice	Difficulty	Companies	Topics
3149. Find the Minimum Cost Array Permutation	Solution	Solve	Hard	Google	Array Bit Manipulation+2
3154. Find Number of Ways to Reach the K-th Stair	Solution	Solve	Hard	Amazon	Bit Manipulation Combinatorics+3
3156. Employee Task Duration and Concurrent Tasks	Solution	Solve	Hard	-	Database
3161. Block Placement Queries	Solution	Solve	Hard	Autodesk+7	Array Binary Indexed Tree+2
3165. Maximum Sum of Subsequence With Non-adjacent Elements	Solution	Solve	Hard	Google+2	Array Divide and Conquer+2
3171. Find Subarray With Bitwise OR Closest to K	Solution	Solve	Hard	Salesforce	Array Binary Search+2
3177. Find the Maximum Length of a Good Subsequence II	Solution	Solve	Hard	Snowflake	Array Dynamic Programming+1
3181. Maximum Total Reward Using Operations II	Solution	Solve	Hard	Mitsogo	Array Bit Manipulation+1
3187. Peaks in Array	Solution	Solve	Hard	Siemens	Array Binary Indexed Tree+1
3188. Find Top Scoring Students II	Solution	Solve	Hard	-	Database
3193. Count the Number of Inversions	Solution	Solve	Hard	Amazon+3	Array Dynamic Programming
3197. Find the Minimum Area to Cover All Ones II	Solution	Solve	Hard	Amazon+3	Array Enumeration+1
3203. Find Minimum Diameter After Merging Two Trees	Solution	Solve	Hard	Google+2	Breadth-First Search Depth-First Search+2
3209. Number of Subarrays With AND Value of K	Solution	Solve	Hard	De Shaw	Array Binary Search+2
3213. Construct String with Minimum Cost	Solution	Solve	Hard	Mitsogo	Array Dynamic Programming+2
3214. Year on Year Growth Rate	Solution	Solve	Hard	Amazon	Database
3219. Minimum Cost for Cutting Cake II	Solution	Solve	Hard	-	Array Greedy+1
3225. Maximum Score From Grid Operations	Solution	Solve	Hard	Hrt	Array Dynamic Programming+2
3229. Minimum Operations to Make Array Equal to Target	Solution	Solve	Hard	Amazon+3	Array Dynamic Programming+3
3231. Minimum Number of Increasing Subsequence to Be Removed	Solution	Solve	Hard	-	Array Binary Search
3235. Check if the Rectangle Corner Is Reachable	Solution	Solve	Hard	Amazon+2	Array Breadth-First Search+4
3236. CEO Subordinate Hierarchy	Solution	Solve	Hard	-	Database
3241. Time Taken to Mark All Nodes	Solution	Solve	Hard	-	Depth-First Search Dynamic Programming+2
3244. Shortest Distance After Road Addition Queries II	Solution	Solve	Hard	-	Array Graph+2
3245. Alternating Groups III	Solution	Solve	Hard	-	Array Binary Indexed Tree
3250. Find the Count of Monotonic Pairs I	Solution	Solve	Hard	Arcesium+1	Array Combinatorics+3
3251. Find the Count of Monotonic Pairs II	Solution	Solve	Hard	BNY Mellon	Array Combinatorics+3
3256. Maximum Value Sum by Placing Three Rooks I	Solution	Solve	Hard	-	Array Dynamic Programming+2
3257. Maximum Value Sum by Placing Three Rooks II	Solution	Solve	Hard	-	Array Dynamic Programming+2
3260. Find the Largest Palindrome Divisible by K	Solution	Solve	Hard	Amazon+1	Dynamic Programming Greedy+3
3261. Count Substrings That Satisfy K-Constraint II	Solution	Solve	Hard	-	Array Binary Search+3
3266. Final Array State After K Multiplication Operations II	Solution	Solve	Hard	Google+1	Array Heap (Priority Queue)+1
3267. Count Almost Equal Pairs II	Solution	Solve	Hard	-	Array Counting+3
3268. Find Overlapping Shifts II	Solution	Solve	Hard	-	Database
3269. Constructing Two Increasing Arrays	Solution	Solve	Hard	-	Array Dynamic Programming
3272. Find the Count of Good Integers	Solution	Solve	Hard	Google+1	Combinatorics Enumeration+2
3273. Minimum Amount of Damage Dealt to Bob	Solution	Solve	Hard	Amazon	Array Greedy+1
3276. Select Cells in Grid With Maximum Score	Solution	Solve	Hard	-	Array Bit Manipulation+3
3277. Maximum XOR Score Subarray Queries	Solution	Solve	Hard	Google	Array Dynamic Programming
3279. Maximum Total Area Occupied by Pistons	Solution	Solve	Hard	-	Array Counting+4
3283. Maximum Number of Moves to Kill All Pawns	Solution	Solve	Hard	Google	Array Bit Manipulation+4
3287. Find the Maximum Sequence Value of Array	Solution	Solve	Hard	Google	Array Bit Manipulation+1
3288. Length of the Longest Increasing Path	Solution	Solve	Hard	-	Array Binary Search+1
3292. Minimum Number of Valid Strings to Form Target II	Solution	Solve	Hard	-	Array Binary Search+6
3298. Count Substrings That Can Be Rearranged to Contain a String II	Solution	Solve	Hard	-	Hash Table Sliding Window+1
3299. Sum of Consecutive Subsequences	Solution	Solve	Hard	-	Array Dynamic Programming+1
3303. Find the Occurrence of First Almost Equal Substring	Solution	Solve	Hard	Google	String String Matching
3307. Find the K-th Character in String Game II	Solution	Solve	Hard	Amazon+2	Bit Manipulation Math+1
3311. Construct 2D Grid Matching Graph Layout	Solution	Solve	Hard	-	Array Graph+2
3312. Sorted GCD Pair Queries	Solution	Solve	Hard	Google	Array Binary Search+6