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
591. Tag Validator	Solve	Hard	Airbnb+1	Stack String
592. Fraction Addition and Subtraction	Solve	Medium	Goldman Sachs	Math Simulation+1
599. Minimum Index Sum of Two Lists	Solve	Easy	Apple+2	Array Hash Table+1
604. Design Compressed String Iterator	Solve	Easy	Google	Array Design+2
606. Construct String from Binary Tree	Solve	Medium	Adobe+3	Binary Tree Depth-First Search+2
609. Find Duplicate File in System	Solve	Medium	Apple+1	Array Hash Table+1
616. Add Bold Tag in String	Solve	Medium	Facebook	Array Hash Table+3
635. Design Log Storage System	Solve	Medium	Twitter	Design Hash Table+2
639. Decode Ways II	Solve	Hard	Microsoft	Dynamic Programming String
640. Solve the Equation	Solve	Medium	Amazon+1	Math Simulation+1
642. Design Search Autocomplete System	Solve	Hard	Amazon+5	Data Stream Depth-First Search+5
647. Palindromic Substrings	Solve	Medium	Expedia+2	Dynamic Programming String+1
648. Replace Words	Solve	Medium	Facebook	Array Hash Table+2
649. Dota2 Senate	Solve	Medium	Valve	Greedy Queue+1
657. Robot Return to Origin	Solve	Easy	Amazon+3	Simulation String
664. Strange Printer	Solve	Hard	Google+2	Dynamic Programming String
676. Implement Magic Dictionary	Solve	Medium	Facebook+1	Depth-First Search Design+3
677. Map Sum Pairs	Solve	Medium	Google	Design Hash Table+2
678. Valid Parenthesis String	Solve	Medium	Amazon+4	Dynamic Programming Greedy+2
680. Valid Palindrome II	Solve	Easy	Amazon+6	Greedy String+1
681. Next Closest Time	Solve	Medium	Amazon+1	Backtracking Enumeration+2
686. Repeated String Match	Solve	Medium	Google	String String Matching
691. Stickers to Spell Word	Solve	Hard	Facebook	Array Backtracking+4
692. Top K Frequent Words	Solve	Medium	Amazon+8	Bucket Sort Counting+5
696. Count Binary Substrings	Solve	Easy	Adobe+8	String Two Pointers
709. To Lower Case	Solve	Easy	Amazon	String
712. Minimum ASCII Delete Sum for Two Strings	Solve	Medium	Activision+2	Dynamic Programming String
720. Longest Word in Dictionary	Solve	Medium	Google	Array Hash Table+3
721. Accounts Merge	Solve	Medium	Amazon+6	Array Breadth-First Search+5
722. Remove Comments	Solve	Medium	Apple+7	Array String
726. Number of Atoms	Solve	Hard	Amazon+5	Hash Table Sorting+2
727. Minimum Window Subsequence	Solve	Hard	Google	Dynamic Programming Sliding Window+1
730. Count Different Palindromic Subsequences	Solve	Hard	Apple+3	Dynamic Programming String
734. Sentence Similarity	Solve	Easy	Facebook+1	Array Hash Table+1
736. Parse Lisp Expression	Solve	Hard	Affirm	Hash Table Recursion+2
737. Sentence Similarity II	Solve	Medium	Amazon	Array Breadth-First Search+4
745. Prefix and Suffix Search	Solve	Hard	Facebook+2	Array Design+3
748. Shortest Completing Word	Solve	Easy	Google	Array Hash Table+1
751. IP to CIDR	Solve	Medium	Airbnb+1	Bit Manipulation String
752. Open the Lock	Solve	Medium	Amazon+4	Array Breadth-First Search+2
758. Bold Words in String	Solve	Medium	Google	Array Hash Table+3
761. Special Binary String	Solve	Hard	Coursera+1	Recursion String
763. Partition Labels	Solve	Medium	Amazon+1	Greedy Hash Table+2
767. Reorganize String	Solve	Medium	Adobe+17	Counting Greedy+4
770. Basic Calculator IV	Solve	Hard	Adobe+1	Hash Table Math+3
771. Jewels and Stones	Solve	Easy	Adobe+2	Hash Table String
772. Basic Calculator III	Solve	Hard	Amazon+12	Math Recursion+2
777. Swap Adjacent in LR String	Solve	Medium	Adobe+2	String Two Pointers
784. Letter Case Permutation	Solve	Medium	Microsoft	Backtracking Bit Manipulation+1
791. Custom Sort String	Solve	Medium	Facebook+1	Hash Table Sorting+1