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
792. Number of Matching Subsequences	Solve	Medium	Google+1	Array Binary Search+5
796. Rotate String	Solve	Easy	Apple+4	String String Matching
800. Similar RGB Color	Solve	Easy	Google	Enumeration Math+1
804. Unique Morse Code Words	Solve	Easy	Square	Array Hash Table+1
806. Number of Lines To Write String	Solve	Easy	-	Array String
809. Expressive Words	Solve	Medium	Cisco+2	Array String+1
811. Subdomain Visit Count	Solve	Medium	Indeed+4	Array Counting+2
816. Ambiguous Coordinates	Solve	Medium	Google	Backtracking Enumeration+1
819. Most Common Word	Solve	Easy	Amazon	Array Counting+2
820. Short Encoding of Words	Solve	Medium	Amazon+1	Array Hash Table+2
821. Shortest Distance to a Character	Solve	Easy	Apple+1	Array String+1
824. Goat Latin	Solve	Easy	Facebook	String
828. Count Unique Characters of All Substrings of a Given String	Solve	Hard	Amazon+3	Dynamic Programming Hash Table+1
830. Positions of Large Groups	Solve	Easy	Google	String
831. Masking Personal Information	Solve	Medium	Twitter	String
833. Find And Replace in String	Solve	Medium	Google+2	Array Hash Table+2
838. Push Dominoes	Solve	Medium	Bloomberg	Dynamic Programming String+1
839. Similar String Groups	Solve	Hard	Apple+1	Array Breadth-First Search+4
842. Split Array into Fibonacci Sequence	Solve	Medium	Amazon	Backtracking String
843. Guess the Word	Solve	Hard	Bloomberg+2	Array Game Theory+3
844. Backspace String Compare	Solve	Easy	Amazon+12	Simulation Stack+2
848. Shifting Letters	Solve	Medium	Oracle	Array Prefix Sum+1
854. K-Similar Strings	Solve	Hard	Bytedance+2	Breadth-First Search String
856. Score of Parentheses	Solve	Medium	Amazon+4	Stack String
859. Buddy Strings	Solve	Easy	DoorDash+4	Hash Table String
880. Decoded String at Index	Solve	Medium	Adobe+4	Stack String
884. Uncommon Words from Two Sentences	Solve	Easy	Facebook+1	Counting Hash Table+1
890. Find and Replace Pattern	Solve	Medium	Apple	Array Hash Table+1
893. Groups of Special-Equivalent Strings	Solve	Medium	Facebook	Array Hash Table+2
899. Orderly Queue	Solve	Hard	Amazon	Math Sorting+1
902. Numbers At Most N Given Digit Set	Solve	Hard	Amazon+1	Array Binary Search+3
903. Valid Permutations for DI Sequence	Solve	Hard	Amazon+1	Dynamic Programming Prefix Sum+1
916. Word Subsets	Solve	Medium	Adobe+2	Array Hash Table+1
917. Reverse Only Letters	Solve	Easy	Amazon	String Two Pointers
921. Minimum Add to Make Parentheses Valid	Solve	Medium	Amazon+3	Greedy Stack+1
925. Long Pressed Name	Solve	Easy	Google	String Two Pointers
926. Flip String to Monotone Increasing	Solve	Medium	Amazon+2	Dynamic Programming String
929. Unique Email Addresses	Solve	Easy	Intuit	Array Hash Table+1
936. Stamping The Sequence	Solve	Hard	-	Greedy Queue+2
937. Reorder Data in Log Files	Solve	Medium	Amazon+1	Array Sorting+1
940. Distinct Subsequences II	Solve	Hard	Google	Dynamic Programming String
942. DI String Match	Solve	Easy	Microsoft	Array Greedy+2
943. Find the Shortest Superstring	Solve	Hard	-	Array Bit Manipulation+3
944. Delete Columns to Make Sorted	Solve	Easy	Google	Array String
949. Largest Time for Given Digits	Solve	Medium	Amazon+3	Array Enumeration+1
953. Verifying an Alien Dictionary	Solve	Easy	Amazon+3	Array Hash Table+1
955. Delete Columns to Make Sorted II	Solve	Medium	Google	Array Greedy+1
960. Delete Columns to Make Sorted III	Solve	Hard	Google	Array Dynamic Programming+1
966. Vowel Spellchecker	Solve	Medium	Thumbtack	Array Hash Table+1
972. Equal Rational Numbers	Solve	Hard	Microsoft	Math String