**‘Recent Articles’ on Strings**

**Topic :**

- Strings in C
- Storage for Strings in C
- String Class in C++
- String Class in Java
- Strings in Python : Set 1, Set 2
- String Methods in Python : Set 1 , Set 2 , Set 3
- Print reverse of a string using recursion
- Reverse an array without affecting special characters
- Remove all duplicates from a given string
- Pangram Checking
- How to split a string in C/C++, Python and Java?
- Remove spaces from a given string

**Character Counting Based Problems :**

- Return maximum occurring character in an input string
- Find the smallest window in a string containing all characters of another string
- C program to find second most frequent character
- K’th Non-repeating Character
- Count number of substrings with exactly k distinct characters
- Find k’th character of decrypted string
- Count characters at same position as in English alphabets
- Check if two strings are k-anagrams or not
- Count words in a given string
- Count of words whose i-th letter is either (i-1)-th, i-th, or (i+1)-th letter of given word
- Count substrings with same first and last characters
- Maximum consecutive repeating character in string
- Count of strings that can be formed using a, b and c under given constraints
- Group words with same set of characters
- Count of total anagram substrings
- Substring with highest frequency length product
- Number of even substrings in a string of digits
- Print all distinct characters of a string in order (3 Methods)
- Smallest window that contains all characters of string itself
- Print common characters of two Strings in alphabetical order
- Program to count occurrence of a given character in a string
- Minimum sum of squares of character counts in a given string after removing k characters
- Program to count vowels in a string (Iterative and Recursive)
- Number of distinct permutation a String can have
- Check if both halves of the string have same set of characters
- Count words that appear exactly two times in an array of words
- Check if frequency of all characters can become same by one removal
- Count ways to increase LCS length of two strings by one
- Print the string after the specified character has occurred given no. of times
- Remove characters from the first string which are present in the second string

- Check whether two strings are anagram of each other
- Given a sequence of words, print all anagrams together | Set 1
- Given a sequence of words, print all anagrams together | Set 2
- Anagram Substring Search
- Print all pairs of anagrams in a given array of strings
- Remove minimum number of characters so that two strings become anagram
- Check if two strings are k-anagrams or not
- Check if binary representations of two numbers are anagram
- Given a sequence of words, print all anagrams together using STL

- C Program to Check if a Given String is Palindrome
- Check if a given string is a rotation of a palindrome
- C++ Program to print all palindromes in a given range
- Check if characters of a given string can be rearranged to form a palindrome
- Dynamic Programming | Set 28 (Minimum insertions to form a palindrome)
- Longest Palindromic Substring | Set 2
- Print all palindromic partitions of a string
- Find all distinct palindromic sub-strings of a given string
- Online algorithm for checking palindrome in a stream
- Given a string, print all possible palindromic partitions
- Count All Palindromic Subsequence in a given String
- Minimum characters to be added at front to make string palindrome
- Palindrome Substring Queries
- Suffix Tree Application 6 – Longest Palindromic Substring
- Palindrome pair in an array of words (or strings)
- Make largest palindrome by changing at most K-digits
- Lexicographically first palindromic string
- Recursive function to check if a string is palindrome
- Minimum number of Appends needed to make a string palindrome
- Longest Non-palindromic substring
- Minimum number of deletions to make a string palindrome
- Minimum steps to delete a string after repeated deletion of palindrome substrings
- Count of Palindromic substrings in an Index range
- Minimum insertions to form a palindrome with permutations allowed
- Nth Even length Palindrome

- Change if all bits can be made same by single flip
- Length of Longest sub-string that can be removed
- Number of flips to make binary string alternate
- Efficient method for 2’s complement of a binary string
- Count binary strings with k times appearing adjacent two set bits
- Given a binary string, count number of substrings that start and end with 1
- Count strings with consecutive 1’s
- Generate all binary strings from given pattern
- Add two bit strings
- Count number of binary strings without consecutive 1’s
- Generate all binary permutations such that there are more or equal 1’s than 0’s before every point in all permutations
- Check if a string follows a^nb^n pattern or not
- Binary representation of next number
- Binary representation of next greater number with same number of 1’s and 0’s
- Decimal representation of given binary string is divisible by 5 or not
- Check if a binary string has a 0 between 1s or not | Set 1
- Check if a binary string has a 0 between 1s or not | Set 2
- Min flips of continuous characters to make all characters same in a string
- Program to add two binary strings
- Ways to remove one element from a binary string so that XOR becomes zero

- Number of subsequences of the form a^i b^j c^k
- Number of subsequences in a string divisible by n
- Find number of times a string occurs as a subsequence in given string
- Count Distinct Subsequences
- Count distinct occurrences as a subsequence
- Longest common subsequence with permutations allowed
- Repeated subsequence of length 2 or more
- Maximum length prefix of one string that occurs as subsequence in another
- Count distinct occurrences as a subsequence
- Print all longest common sub-sequences in lexicographical order
- Printing Longest Common Subsequence
- Given a number as a string, find the number of contiguous subsequences which recursively add up to 9
- Printing Longest Common Subsequence | Set 2
- Given a number as a string, find the number of contiguous subsequences which recursively add up to 9 | Set 2
- Printing Shortest Common Supersequence
- A Space Optimized Solution of LCS
- Given two strings, find if first string is a subsequence of second
- Shortest Common Supersequence
- Longest Repeating Subsequence
- Find largest word in dictionary by deleting some characters of given string
- Dynamic Programming | Set 12 (Longest Palindromic Subsequence)
- Minimum number of palindromic subsequences to be removed to empty a binary string
- Count All Palindromic Subsequence in a given String
- Queries on subsequence of string

- Searching for Patterns | Set 1 (Naive Pattern Searching)
- Searching for Patterns | Set 2 (KMP Algorithm)
- Searching for Patterns | Set 3 (Rabin-Karp Algorithm)
- Searching for Patterns | Set 5 (Finite Automata)
- Pattern Searching | Set 7 (Boyer Moore Algorithm – Bad Character Heuristic)
- String matching where one string contains wildcard characters
- Anagram Substring Search
- Manacher’s Algorithm – Linear Time Longest Palindromic Substring – Part 1
- Manacher’s Algorithm – Linear Time Longest Palindromic Substring – Part 2
- Manacher’s Algorithm – Linear Time Longest Palindromic Substring – Part 3
- Manacher’s Algorithm – Linear Time Longest Palindromic Substring – Part 4
- Z algorithm
- Search a Word in a 2D Grid of characters
- Find all occurrences of a given word in a matrix
- Maximum length prefix of one string that occurs as subsequence in another
- Wildcard Pattern Matching
- Replace all occurrences of string AB with C without using extra space
- Aho-Corasick Algorithm
- Find all the patterns of “1(0+)1” in a given string | SET 1
- Find all the patterns of “1(0+)1” in a given string | SET 2

- A Program to check if strings are rotations of each other or not
- Print all the duplicates in the input string
- Write a program to print all permutations of a given string
- Divide a string in N equal parts
- Given a string, find its first non-repeating character
- Print list items containing all characters of a given word
- Reverse words in a given string
- Run Length Encoding
- Print all permutations with repetition of characters
- Rearrange a string so that all same characters become d distance away
- Recursively remove all adjacent duplicates
- Remove “b” and “ac” from a given string
- Find the first non-repeating character from a stream of characters
- String matching where one string contains wildcard characters
- An in-place algorithm for String Transformation
- Lexicographic rank of a string
- Check whether a given string is an interleaving of two other given strings
- Given a sorted dictionary of an alien language, find order of characters
- Find Excel column name from a given column number
- C Program to Sort an array of names or strings
- Print all possible words from phone digits
- Rearrange a string so that all same characters become d distance away
- C++ Program to remove spaces from a string
- Recursively print all sentences that can be formed from list of word lists
- Check if a given sequence of moves for a robot is circular or not
- Find the longest substring with k unique characters in a given string
- Function to find Number of customers who could not get a computer
- Find maximum depth of nested parenthesis in a string
- Find if a given string can be represented from a substring by iterating the substring “n” times
- Print all possible strings that can be made by placing spaces
- Check a given sentence for a given set of simple grammer rules
- Remove recurring digits in a given number
- Check if edit distance between two strings is one
- Recursive Implementation of atoi()
- Length of the longest valid substring
- Check if two given strings are isomorphic to each other
- Print string of odd length in ‘X’ format
- Transform One String to Another using Minimum Number of Given Operation
- Print all ways to break a string in bracket form
- All combinations of strings that can be used to dial a number
- Caesar Cipher
- Print Concatenation of Zig-Zag String in ‘n’ Rows

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