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
2942. Find Words Containing Character	Solve	Easy	Amazon+1	Array String
2947. Count Beautiful Substrings I	Solve	Medium	Amazon	Enumeration Hash Table+4
2949. Count Beautiful Substrings II	Solve	Hard	Amazon	Hash Table Math+3
2950. Number of Divisible Substrings	Solve	Medium	Amdocs	Counting Hash Table+2
2953. Count Complete Substrings	Solve	Hard	Meesho	Hash Table Sliding Window+1
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
2977. Minimum Cost to Convert String II	Solve	Hard	Atlassian	Array Dynamic Programming+4
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
2983. Palindrome Rearrangement Queries	Solve	Hard	-	Hash Table Prefix Sum+1
2999. Count the Number of Powerful Integers	Solve	Hard	-	Dynamic Programming Math+1
3003. Maximize the Number of Partitions After Operations	Solve	Hard	-	Bit Manipulation Bitmask+2
3006. Find Beautiful Indices in the Given Array I	Solve	Medium	-	Binary Search Hash Function+4
3008. Find Beautiful Indices in the Given Array II	Solve	Hard	-	Binary Search Hash Function+4
3014. Minimum Number of Pushes to Type Word I	Solve	Easy	-	Greedy Math+1
3016. Minimum Number of Pushes to Type Word II	Solve	Medium	-	Counting Greedy+3
3019. Number of Changing Keys	Solve	Easy	-	String
3029. Minimum Time to Revert Word to Initial State I	Solve	Medium	-	Hash Function Rolling Hash+2
3031. Minimum Time to Revert Word to Initial State II	Solve	Hard	-	Hash Function Rolling Hash+2
3035. Maximum Palindromes After Operations	Solve	Medium	-	Array Counting+4
3042. Count Prefix and Suffix Pairs I	Solve	Easy	-	Array Hash Function+4
3043. Find the Length of the Longest Common Prefix	Solve	Medium	-	Array Hash Table+2
3045. Count Prefix and Suffix Pairs II	Solve	Hard	-	Array Hash Function+4
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
3083. Existence of a Substring in a String and Its Reverse	Solve	Easy	-	Hash Table String
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
3088. Make String Anti-palindrome	Solve	Hard	-	Counting Sort Greedy+2
3090. Maximum Length Substring With Two Occurrences	Solve	Easy	-	Hash Table Sliding Window+1
3093. Longest Common Suffix Queries	Solve	Hard	-	Array String+1
3104. Find Longest Self-Contained Substring	Solve	Hard	-	Binary Search Hash Table+2
3106. Lexicographically Smallest String After Operations With Constraint	Solve	Medium	-	Greedy String
3110. Score of a String	Solve	Easy	-	String
3114. Latest Time You Can Obtain After Replacing Characters	Solve	Easy	-	Enumeration String
3119. Maximum Number of Potholes That Can Be Fixed	Solve	Medium	GEICO	Greedy Sorting+1
3120. Count the Number of Special Characters I	Solve	Easy	-	Hash Table String
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
3136. Valid Word	Solve	Easy	-	String
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
3146. Permutation Difference between Two Strings	Solve	Easy	-	Hash Table String
3163. String Compression III	Solve	Medium	-	String