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
1401. Circle and Rectangle Overlapping	Solve	Medium	Adobe	Geometry Math
1402. Reducing Dishes	Solve	Hard	American Express+2	Array Dynamic Programming+2
1403. Minimum Subsequence in Non-Increasing Order	Solve	Easy	Amazon+1	Array Greedy+1
1404. Number of Steps to Reduce a Number in Binary Representation to One	Solve	Medium	Amazon+2	Bit Manipulation String
1405. Longest Happy String	Solve	Medium	Amazon+4	Greedy Heap (Priority Queue)+1
1406. Stone Game III	Solve	Hard	Google	Array Dynamic Programming+2
1407. Top Travellers	Solve	Easy	Point72	Database
1408. String Matching in an Array	Solve	Easy	Amazon+1	Array String+1
1409. Queries on a Permutation With Key	Solve	Medium	Amazon	Array Binary Indexed Tree+1
1410. HTML Entity Parser	Solve	Medium	Oracle	Hash Table String
1411. Number of Ways to Paint N × 3 Grid	Solve	Hard	Hackerrank	Dynamic Programming
1412. Find the Quiet Students in All Exams	Solve	Hard	-	Database
1413. Minimum Value to Get Positive Step by Step Sum	Solve	Easy	Amazon+1	Array Prefix Sum
1414. Find the Minimum Number of Fibonacci Numbers Whose Sum Is K	Solve	Medium	Amazon+1	Greedy Math
1415. The k-th Lexicographical String of All Happy Strings of Length n	Solve	Medium	Microsoft	Backtracking String
1416. Restore The Array	Solve	Hard	Amazon+2	Dynamic Programming String
1417. Reformat The String	Solve	Easy	Google+1	String
1418. Display Table of Food Orders in a Restaurant	Solve	Medium	JP Morgan	Array Hash Table+3
1419. Minimum Number of Frogs Croaking	Solve	Medium	Amazon+3	Counting String
1420. Build Array Where You Can Find The Maximum Exactly K Comparisons	Solve	Hard	Dunzo	Dynamic Programming Prefix Sum
1421. NPV Queries	Solve	Easy	Amazon	Database
1422. Maximum Score After Splitting a String	Solve	Easy	Google	Prefix Sum String
1423. Maximum Points You Can Obtain from Cards	Solve	Medium	Adobe+2	Array Prefix Sum+1
1424. Diagonal Traverse II	Solve	Medium	Facebook+2	Array Heap (Priority Queue)+1
1425. Constrained Subsequence Sum	Solve	Hard	Akuna Capital	Array Dynamic Programming+4
1426. Counting Elements	Solve	Easy	DRW	Array Hash Table
1427. Perform String Shifts	Solve	Easy	Goldman Sachs	Array Math+1
1428. Leftmost Column with at Least a One	Solve	Medium	Facebook+2	Array Binary Search+2
1429. First Unique Number	Solve	Medium	Amazon+1	Array Data Stream+3
1430. Check If a String Is a Valid Sequence from Root to Leaves Path in a Binary Tree	Solve	Medium	23&me	Binary Tree Breadth-First Search+2
1431. Kids With the Greatest Number of Candies	Solve	Easy	Amazon	Array
1432. Max Difference You Can Get From Changing an Integer	Solve	Medium	Mercari	Greedy Math
1433. Check If a String Can Break Another String	Solve	Medium	Endurance	Greedy Sorting+1
1434. Number of Ways to Wear Different Hats to Each Other	Solve	Hard	Mindtickle	Array Bit Manipulation+2
1435. Create a Session Bar Chart	Solve	Easy	Twitch	Database
1436. Destination City	Solve	Easy	Google+1	Array Hash Table+1
1437. Check If All 1's Are at Least Length K Places Away	Solve	Easy	United Health Group	Array
1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Solve	Medium	Amazon+2	Array Heap (Priority Queue)+4
1439. Find the Kth Smallest Sum of a Matrix With Sorted Rows	Solve	Hard	Bloomberg	Array Binary Search+2
1440. Evaluate Boolean Expression	Solve	Medium	Point72	Database
1441. Build an Array With Stack Operations	Solve	Medium	24/7 Innovation Labs+4	Array Simulation+1
1442. Count Triplets That Can Form Two Arrays of Equal XOR	Solve	Medium	-	Array Bit Manipulation+3
1443. Minimum Time to Collect All Apples in a Tree	Solve	Medium	Apple+2	Breadth-First Search Depth-First Search+2
1444. Number of Ways of Cutting a Pizza	Solve	Hard	Bytedance+2	Array Dynamic Programming+2
1445. Apples & Oranges	Solve	Medium	Facebook	Database
1446. Consecutive Characters	Solve	Easy	Apple+1	String
1447. Simplified Fractions	Solve	Medium	Google	Math Number Theory+1
1448. Count Good Nodes in Binary Tree	Solve	Medium	Microsoft+1	Binary Tree Breadth-First Search+2
1449. Form Largest Integer With Digits That Add up to Target	Solve	Hard	Google	Array Dynamic Programming
1450. Number of Students Doing Homework at a Given Time	Solve	Easy	Yandex	Array