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Array of Strings in C++ - 5 Different Ways to Create

Last Updated: 11 March 2023

In C++, a string is usually just an array of (or a reference/points to) characters that ends with the NULL character '\0'. A string is a 1-dimensional array of characters ...read more

Caesar Cipher in Cryptography

Last Updated: 11 May 2023

The Caesar cipher is a simple encryption technique that was used by Julius Caesar to send secret messages to his allies. It works by shifting the letters in the plaintext ...read more

Longest Palindromic Substring

Last Updated: 11 October 2023

Given a string str, the task is to find the longest substring which is a palindrome.Examples:Input: str = "forgeeksskeegfor"Output: "geeksskeeg"Explanation: There are seve...read more

Check whether two Strings are anagram of each other

Last Updated: 03 October 2023

Given two strings. The task is to check whether the given strings are anagrams of each other or not.An anagram of a string is another string that contains the same charact ...read more

Length of the longest substring without repeating characters

Last Updated: 31 October 2023

Given a string str, find the length of the longest substring without repeating characters.Example:Example 1:Input: "ABCDEFGABEF"Output: 7Explanation: The longest substrin ...read more

Longest Common Subsequence (LCS)

Last Updated: 05 October 2023

Given two strings, S1 and S2, the task is to find the length of the Longest Common Subsequence, i.e. longest subsequence present in both of the strings.A longest common su...read more

KMP Algorithm for Pattern Searching

Last Updated: 16 November 2023

Given a text txt[0 . . . N-1] and a pattern pat[0 . . . M-1], write a function search(char pat[], char txt[]) that prints all occurrences of pat[] in txt[]. You may assume...read more

Reverse words in a given string

Last Updated: 13 September 2023

Given a string, the task is to reverse the order of the words in the given string.Examples:Input: s = "geeks quiz practice code"Output: s = "code practice quiz geeks"Input...read more

Check for Balanced Brackets in an expression (well-formedness)

Last Updated: 04 May 2023

Given an expression string exp, write a program to examine whether the pairs and the orders of "{", "}", "(", ")", "[", "]" are correct in the given expression.Example:Inp...read more

Write a program to reverse an array or string

Last Updated: 06 October 2023

Given an array (or string), the task is to reverse the array/string.Examples :Input : arr[] = {1, 2, 3}Output : arr[] = {3, 2, 1}Input : arr[] = {4, 5, 1, 2}Output : arr...read more

Permutations of given String

Last Updated: 18 October 2023

Given a string S, the task is to write a program to print all permutations of a given string.A permutation also called an "arrangement number" or "order," is a rearrangeme...read more

Remove duplicates from a given string

Last Updated: 20 September 2023

Given a string S which may contain lowercase and uppercase characters. The task is to remove all duplicate characters from the string and find the resultant string. Note: ...read more

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