Dashboard Questions Topics Companies Sheets

String

Topic

744 coding problems covering String concepts. Master this topic and improve your problem-solving skills.

744

Problems

214

Easy

369

Medium

161

Hard

Difficulty

All744 Easy214 Medium369 Hard161

Title	Solve	Difficulty	Companies	Topics
3. Longest Substring Without Repeating Characters	Solve	Medium	Adobe+20	Hash Table Sliding Window+1
5. Longest Palindromic Substring	Solve	Medium	Accenture+50	Dynamic Programming String+1
6. Zigzag Conversion	Solve	Medium	Adobe+2	String
8. String to Integer (atoi)	Solve	Medium	Adobe+8	String
12. Integer to Roman	Solve	Medium	Adobe+8	Hash Table Math+1
17. Letter Combinations of a Phone Number	Solve	Medium	Airtel+34	Backtracking Hash Table+1
22. Generate Parentheses	Solve	Medium	Adobe+12	Backtracking Dynamic Programming+1
38. Count and Say	Solve	Medium	Adobe+6	String
43. Multiply Strings	Solve	Medium	Adobe+5	Math Simulation+1
49. Group Anagrams	Solve	Medium	Adobe+23	Array Hash Table+2
71. Simplify Path	Solve	Medium	Amazon+3	Stack String
72. Edit Distance	Solve	Medium	Amazon+7	Dynamic Programming String
79. Word Search	Solve	Medium	Amazon+8	Array Backtracking+2
91. Decode Ways	Solve	Medium	Amazon+8	Dynamic Programming String
93. Restore IP Addresses	Solve	Medium	Amazon+6	Backtracking String
97. Interleaving String	Solve	Medium	Amazon+23	Dynamic Programming String
131. Palindrome Partitioning	Solve	Medium	Amazon+4	Backtracking Dynamic Programming+1
139. Word Break	Solve	Medium	Accenture+38	Array Dynamic Programming+4
151. Reverse Words in a String	Solve	Medium	Amazon+5	String Two Pointers
159. Longest Substring with At Most Two Distinct Characters	Solve	Medium	Amazon+1	Hash Table Sliding Window+1
161. One Edit Distance	Solve	Medium	Facebook+2	String Two Pointers
165. Compare Version Numbers	Solve	Medium	Amazon+3	String Two Pointers
166. Fraction to Recurring Decimal	Solve	Medium	Airbnb+3	Hash Table Math+1
179. Largest Number	Solve	Medium	Adobe+8	Array Greedy+2
186. Reverse Words in a String II	Solve	Medium	Microsoft	String Two Pointers
187. Repeated DNA Sequences	Solve	Medium	Amazon+1	Bit Manipulation Hash Function+4
208. Implement Trie (Prefix Tree)	Solve	Medium	Amazon+8	Design Hash Table+2
211. Design Add and Search Words Data Structure	Solve	Medium	Amazon+6	Depth-First Search Design+2
227. Basic Calculator II	Solve	Medium	Amazon+9	Math Stack+1
241. Different Ways to Add Parentheses	Solve	Medium	Bloomberg+2	Dynamic Programming Math+3
244. Shortest Word Distance II	Solve	Medium	LinkedIn	Array Design+3
245. Shortest Word Distance III	Solve	Medium	Amazon+1	Array String
247. Strobogrammatic Number II	Solve	Medium	Facebook+2	Array Recursion+1
249. Group Shifted Strings	Solve	Medium	Facebook+1	Array Hash Table+1
267. Palindrome Permutation II	Solve	Medium	Cruise Automation+1	Backtracking Hash Table+1
271. Encode and Decode Strings	Solve	Medium	Facebook+1	Array Design+1
288. Unique Word Abbreviation	Solve	Medium	Facebook+1	Array Design+2
291. Word Pattern II	Solve	Medium	Bolt+2	Backtracking Hash Table+1
299. Bulls and Cows	Solve	Medium	Facebook+1	Counting Hash Table+1
306. Additive Number	Solve	Medium	Booking.com+1	Backtracking String
316. Remove Duplicate Letters	Solve	Medium	Amazon+6	Greedy Monotonic Stack+2
318. Maximum Product of Word Lengths	Solve	Medium	Bloomberg	Array Bit Manipulation+1
320. Generalized Abbreviation	Solve	Medium	Google	Backtracking Bit Manipulation+1
331. Verify Preorder Serialization of a Binary Tree	Solve	Medium	Google	Binary Tree Stack+2
340. Longest Substring with At Most K Distinct Characters	Solve	Medium	Amazon+1	Hash Table Sliding Window+1
385. Mini Parser	Solve	Medium	Airbnb	Depth-First Search Stack+1
388. Longest Absolute File Path	Solve	Medium	Amazon+1	Depth-First Search Stack+1
394. Decode String	Solve	Medium	Adobe+16	Recursion Stack+1
395. Longest Substring with At Least K Repeating Characters	Solve	Medium	Amazon+1	Divide and Conquer Hash Table+2
399. Evaluate Division	Solve	Medium	Adobe+8	Array Breadth-First Search+5