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
411. Minimum Unique Word Abbreviation	Solve	Hard	Google	Array Backtracking+2
412. Fizz Buzz	Solve	Easy	Apple+2	Math Simulation+1
415. Add Strings	Solve	Easy	Amazon+7	Math Simulation+1
418. Sentence Screen Fitting	Solve	Medium	Google	Array Dynamic Programming+1
420. Strong Password Checker	Solve	Hard	Amazon+1	Greedy Heap (Priority Queue)+1
423. Reconstruct Original Digits from English	Solve	Medium	JPMorgan	Hash Table Math+1
424. Longest Repeating Character Replacement	Solve	Medium	Adobe+3	Hash Table Sliding Window+1
425. Word Squares	Solve	Hard	Google	Array Backtracking+2
428. Serialize and Deserialize N-ary Tree	Solve	Hard	Amazon+7	Breadth-First Search Depth-First Search+2
433. Minimum Genetic Mutation	Solve	Medium	Amazon+4	Breadth-First Search Hash Table+1
434. Number of Segments in a String	Solve	Easy	Apple	String
438. Find All Anagrams in a String	Solve	Medium	Adobe+9	Hash Table Sliding Window+1
439. Ternary Expression Parser	Solve	Medium	Snapchat	Recursion Stack+1
443. String Compression	Solve	Medium	Amazon+8	String Two Pointers
449. Serialize and Deserialize BST	Solve	Medium	Amazon+2	Binary Search Tree Binary Tree+5
451. Sort Characters By Frequency	Solve	Medium	Amazon+4	Bucket Sort Counting+4
459. Repeated Substring Pattern	Solve	Easy	Amazon+4	String String Matching
466. Count The Repetitions	Solve	Hard	Amazon	Dynamic Programming String
467. Unique Substrings in Wraparound String	Solve	Medium	Apple+1	Dynamic Programming String
468. Validate IP Address	Solve	Medium	Amazon+2	String
471. Encode String with Shortest Length	Solve	Hard	Google	Dynamic Programming String
472. Concatenated Words	Solve	Hard	Amazon+1	Array Depth-First Search+3
474. Ones and Zeroes	Solve	Medium	Apple	Array Dynamic Programming+1
481. Magical String	Solve	Medium	Google	String Two Pointers
482. License Key Formatting	Solve	Easy	Capital One+1	String
484. Find Permutation	Solve	Medium	Goldman Sachs+1	Array Greedy+2
488. Zuma Game	Solve	Hard	Baidu+2	Breadth-First Search Dynamic Programming+3
499. The Maze III	Solve	Hard	Google	Array Breadth-First Search+6
500. Keyboard Row	Solve	Easy	Mathworks	Array Hash Table+1
514. Freedom Trail	Solve	Hard	DE Shaw+1	Breadth-First Search Depth-First Search+2
516. Longest Palindromic Subsequence	Solve	Medium	Amazon+5	Dynamic Programming String
520. Detect Capital	Solve	Easy	Amazon+1	String
521. Longest Uncommon Subsequence I	Solve	Easy	Google	String
522. Longest Uncommon Subsequence II	Solve	Medium	Apple	Array Hash Table+3
524. Longest Word in Dictionary through Deleting	Solve	Medium	Google	Array Sorting+2
527. Word Abbreviation	Solve	Hard	Google+1	Array Greedy+3
535. Encode and Decode TinyURL	Solve	Medium	Amazon+2	Design Hash Function+2
536. Construct Binary Tree from String	Solve	Medium	Facebook	Binary Tree Depth-First Search+3
537. Complex Number Multiplication	Solve	Medium	Amazon	Math Simulation+1
539. Minimum Time Difference	Solve	Medium	Amazon+1	Array Math+2
541. Reverse String II	Solve	Easy	Adobe	String Two Pointers
544. Output Contest Matches	Solve	Medium	Google	Recursion Simulation+1
551. Student Attendance Record I	Solve	Easy	Google	String
555. Split Concatenated Strings	Solve	Medium	Alibaba	Array Greedy+1
556. Next Greater Element III	Solve	Medium	Adobe+10	Math String+1
557. Reverse Words in a String III	Solve	Easy	Accolite+27	String Two Pointers
564. Find the Closest Palindrome	Solve	Hard	Amazon+5	Math String
567. Permutation in String	Solve	Medium	Amazon+7	Hash Table Sliding Window+2
583. Delete Operation for Two Strings	Solve	Medium	Amazon	Dynamic Programming String
588. Design In-Memory File System	Solve	Hard	Amazon+5	Design Hash Table+3