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
1202. Smallest String With Swaps	Solve	Medium	Amazon+3	Array Breadth-First Search+5
1208. Get Equal Substrings Within Budget	Solve	Medium	IBM+1	Binary Search Prefix Sum+2
1209. Remove All Adjacent Duplicates in String II	Solve	Medium	Amazon+7	Stack String
1216. Valid Palindrome III	Solve	Hard	Amazon+1	Dynamic Programming String
1221. Split a String in Balanced Strings	Solve	Easy	Adobe+3	Counting Greedy+1
1233. Remove Sub-Folders from the Filesystem	Solve	Medium	Amazon+1	Array Depth-First Search+2
1234. Replace the Substring for Balanced String	Solve	Medium	Accolite+1	Sliding Window String
1236. Web Crawler	Solve	Medium	Bloomberg+2	Breadth-First Search Depth-First Search+2
1239. Maximum Length of a Concatenated String with Unique Characters	Solve	Medium	Adobe+5	Array Backtracking+2
1247. Minimum Swaps to Make Strings Equal	Solve	Medium	JPMorgan and Chase	Greedy Math+1
1249. Minimum Remove to Make Valid Parentheses	Solve	Medium	Adobe+6	Stack String
1255. Maximum Score Words Formed by Letters	Solve	Hard	Amazon+1	Array Backtracking+4
1256. Encode Number	Solve	Medium	Quora	Bit Manipulation Math+1
1257. Smallest Common Region	Solve	Medium	Airbnb	Array Breadth-First Search+4
1258. Synonymous Sentences	Solve	Medium	Amazon+1	Array Backtracking+3
1268. Search Suggestions System	Solve	Medium	Adobe+5	Array Binary Search+4
1271. Hexspeak	Solve	Easy	Virtu Financial	Math String
1278. Palindrome Partitioning III	Solve	Hard	-	Dynamic Programming String
1286. Iterator for Combination	Solve	Medium	Uber	Backtracking Design+2
1297. Maximum Number of Occurrences of a Substring	Solve	Medium	Amazon	Hash Table Sliding Window+1
1307. Verbal Arithmetic Puzzle	Solve	Hard	Atlassian+2	Array Backtracking+2
1309. Decrypt String from Alphabet to Integer Mapping	Solve	Easy	Quip(Salesforce)	String
1312. Minimum Insertion Steps to Make a String Palindrome	Solve	Hard	Adobe+10	Dynamic Programming String
1316. Distinct Echo Substrings	Solve	Hard	Google	Hash Function Rolling Hash+2
1320. Minimum Distance to Type a Word Using Two Fingers	Solve	Hard	Google	Dynamic Programming String
1324. Print Words Vertically	Solve	Medium	Microsoft+1	Array Simulation+1
1328. Break a Palindrome	Solve	Medium	Expedia+10	Greedy String
1332. Remove Palindromic Subsequences	Solve	Easy	Bloomberg	String Two Pointers
1347. Minimum Number of Steps to Make Two Strings Anagram	Solve	Medium	Bloomberg+5	Counting Hash Table+1
1358. Number of Substrings Containing All Three Characters	Solve	Medium	Adobe+2	Hash Table Sliding Window+1
1360. Number of Days Between Two Dates	Solve	Easy	Amazon	Math String
1366. Rank Teams by Votes	Solve	Medium	Atlassian+3	Array Counting+3
1370. Increasing Decreasing String	Solve	Easy	Akuna Capital+1	Counting Hash Table+1
1371. Find the Longest Substring Containing Vowels in Even Counts	Solve	Medium	Microsoft	Bit Manipulation Hash Table+2
1374. Generate a String With Characters That Have Odd Counts	Solve	Easy	Microsoft	String
1392. Longest Happy Prefix	Solve	Hard	Amazon	Hash Function Rolling Hash+2
1396. Design Underground System	Solve	Medium	Amazon+1	Design Hash Table+1
1397. Find All Good Strings	Solve	Hard	Dunzo	Dynamic Programming String+1
1400. Construct K Palindrome Strings	Solve	Medium	Uber	Counting Greedy+2
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
1408. String Matching in an Array	Solve	Easy	Amazon+1	Array String+1
1410. HTML Entity Parser	Solve	Medium	Oracle	Hash Table String
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
1422. Maximum Score After Splitting a String	Solve	Easy	Google	Prefix Sum String
1427. Perform String Shifts	Solve	Easy	Goldman Sachs	Array Math+1