Introduction Strings are like a series of characters stored in a specific order . Each character in a string is assigned an index, starting from 0. This means the first character is at index 0, the...

Problem Description: Given a string s, return the number of palindromic substrings in it. A string is a palindrome when it reads the same backward as forward. A substring is a contiguous sequence o...

Problem Statement: Given two strings s and t. Find the smallest window substring of s that includes all characters in t (including duplicates) , in the window. Return the empty string "" if no such...

Problem Statement: Given an array of strings words[], the task is to return the longest string chain. A string chain is defined as a sequence of words where: Each word (except the first) can be for...

Problem Statement: Given an m x n grid of characters board and a string word, return true if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cells, wh...

Problem Statement: You are given a string, find its lexicographical rank among all its permutations. Examples Example 1: Input: S = "abc" Output: rank = 1 Explanation: The string "abc" is the first...

Problem Statment: Given two Strings copy the contents of one string to another. Example 1 : Input: str1="Takeuforward", str2="" Output: str2=Takeuforward Explanation: Contents of str1 is copied in...

Problem Statement: Given two Strings concatenate one string to another and print the result. Examples Input: str1 = "Take", str2 = "Uforward" Output: TakeUforward Explanation : The two strings are...

Problem Statement: Given a String, reverse the string and print it. Examples Input : str = "Takeuforward" Output : drawrofuekat Explanation : The characters are reversed from end to start. Input :...

Problem Statement: Given a string text and a string pattern, implement the Rabin-Karp algorithm to find the starting index of all occurrences of pattern in text. If pattern is not found, return an...

Introduction Strings are like a series of characters stored in a specific order . Each character in a string is assigned an index, starting from 0. This means the first character is at index 0, the...

Problem Description: Given a string s, return the number of palindromic substrings in it. A string is a palindrome when it reads the same backward as forward. A substring is a contiguous sequence o...

Problem Statement: Given two strings s and t. Find the smallest window substring of s that includes all characters in t (including duplicates) , in the window. Return the empty string "" if no such...

Problem Statement: Given an array of strings words[], the task is to return the longest string chain. A string chain is defined as a sequence of words where: Each word (except the first) can be for...

Problem Statement: Given an m x n grid of characters board and a string word, return true if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cells, wh...

Problem Statement: You are given a string, find its lexicographical rank among all its permutations. Examples Example 1: Input: S = "abc" Output: rank = 1 Explanation: The string "abc" is the first...

Problem Statment: Given two Strings copy the contents of one string to another. Example 1 : Input: str1="Takeuforward", str2="" Output: str2=Takeuforward Explanation: Contents of str1 is copied in...

Problem Statement: Given two Strings concatenate one string to another and print the result. Examples Input: str1 = "Take", str2 = "Uforward" Output: TakeUforward Explanation : The two strings are...

Problem Statement: Given a String, reverse the string and print it. Examples Input : str = "Takeuforward" Output : drawrofuekat Explanation : The characters are reversed from end to start. Input :...

Problem Statement: Given a string text and a string pattern, implement the Rabin-Karp algorithm to find the starting index of all occurrences of pattern in text. If pattern is not found, return an...