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
2575. Find the Divisibility Array of a String	Solve	Medium	Amazon	Array Math+1
2590. Design a Todo List	Solve	Medium	-	Array Design+3
2606. Find the Substring With Maximum Cost	Solve	Medium	Amazon	Array Dynamic Programming+2
2645. Minimum Additions to Make Valid String	Solve	Medium	Google	Dynamic Programming Greedy+2
2707. Extra Characters in a String	Solve	Medium	Amazon+2	Array Dynamic Programming+3
2712. Minimum Cost to Make All Characters Equal	Solve	Medium	-	Dynamic Programming Greedy+1
2730. Find the Longest Semi-Repetitive Substring	Solve	Medium	-	Sliding Window String
2734. Lexicographically Smallest String After Substring Operation	Solve	Medium	-	Greedy String
2743. Count Substrings Without Repeating Character	Solve	Medium	-	Hash Table Sliding Window+1
2746. Decremental String Concatenation	Solve	Medium	-	Array Dynamic Programming+1
2767. Partition String Into Minimum Beautiful Substrings	Solve	Medium	-	Backtracking Dynamic Programming+2
2785. Sort Vowels in a String	Solve	Medium	Google+1	Sorting String
2800. Shortest String That Contains Three Strings	Solve	Medium	DE Shaw	Enumeration Greedy+1
2802. Find The K-th Lucky Number	Solve	Medium	-	Bit Manipulation Math+1
2825. Make String a Subsequence Using Cyclic Increments	Solve	Medium	Amazon	String Two Pointers
2840. Check if Strings Can be Made Equal With Operations II	Solve	Medium	Citrix	Hash Table Sorting+1
2844. Minimum Operations to Make a Special Number	Solve	Medium	-	Enumeration Greedy+2
2896. Apply Operations to Make Two Strings Equal	Solve	Medium	Zeta	Dynamic Programming String
2901. Longest Unequal Adjacent Groups Subsequence II	Solve	Medium	Fourkites	Array Dynamic Programming+1
2904. Shortest and Lexicographically Smallest Beautiful String	Solve	Medium	Amazon+1	Sliding Window String
2914. Minimum Number of Changes to Make Binary String Beautiful	Solve	Medium	-	String
2933. High-Access Employees	Solve	Medium	Atlassian	Array Hash Table+2
2938. Separate Black and White Balls	Solve	Medium	1Kosmos	Greedy String+1
2947. Count Beautiful Substrings I	Solve	Medium	Amazon	Enumeration Hash Table+4
2950. Number of Divisible Substrings	Solve	Medium	Amdocs	Counting Hash Table+2
2955. Number of Same-End Substrings	Solve	Medium	Sprinklr	Array Counting+3
2957. Remove Adjacent Almost-Equal Characters	Solve	Medium	Salesforce	Dynamic Programming Greedy+1
2976. Minimum Cost to Convert String I	Solve	Medium	Atlassian	Array Graph+2
2981. Find Longest Special Substring That Occurs Thrice I	Solve	Medium	Google	Binary Search Counting+3
2982. Find Longest Special Substring That Occurs Thrice II	Solve	Medium	Google	Binary Search Counting+3
3006. Find Beautiful Indices in the Given Array I	Solve	Medium	-	Binary Search Hash Function+4
3016. Minimum Number of Pushes to Type Word II	Solve	Medium	-	Counting Greedy+3
3029. Minimum Time to Revert Word to Initial State I	Solve	Medium	-	Hash Function Rolling Hash+2
3035. Maximum Palindromes After Operations	Solve	Medium	-	Array Counting+4
3043. Find the Length of the Longest Common Prefix	Solve	Medium	-	Array Hash Table+2
3076. Shortest Uncommon Substring in an Array	Solve	Medium	-	Array Hash Table+2
3078. Match Alphanumerical Pattern in Matrix I	Solve	Medium	-	Array Hash Table+2
3081. Replace Question Marks in String to Minimize Its Value	Solve	Medium	-	Counting Greedy+4
3084. Count Substrings Starting and Ending with Given Character	Solve	Medium	-	Counting Math+1
3085. Minimum Deletions to Make String K-Special	Solve	Medium	-	Counting Greedy+3
3106. Lexicographically Smallest String After Operations With Constraint	Solve	Medium	-	Greedy String
3119. Maximum Number of Potholes That Can Be Fixed	Solve	Medium	GEICO	Greedy Sorting+1
3121. Count the Number of Special Characters II	Solve	Medium	-	Hash Table String
3125. Maximum Number That Makes Result of Bitwise AND Zero	Solve	Medium	-	Greedy Sorting+1
3135. Equalize Strings by Adding or Removing Characters at Ends	Solve	Medium	-	Binary Search Dynamic Programming+3
3137. Minimum Number of Operations to Make Word K-Periodic	Solve	Medium	-	Counting Hash Table+1
3138. Minimum Length of Anagram Concatenation	Solve	Medium	-	Counting Hash Table+1
3143. Maximum Points Inside the Square	Solve	Medium	-	Array Binary Search+3
3144. Minimum Substring Partition of Equal Character Frequency	Solve	Medium	-	Counting Dynamic Programming+2
3163. String Compression III	Solve	Medium	-	String