strings

139+ posts

Last Updated: 27 September 2026

Given a string s, count the total distinct vowels in the string. The string s contains lowercase letters only.Examples:Input: s = geeksforgeeksOutput: 2Explanation: String...read more

DSA

strings

String Comparison

Last Updated: 26 September 2026

Given two strings s1 and s2 and compare them lexicographically. Return 0 if both the strings are equal, 1 if s1 is greater than s2, and -1 if s1 is lesser than s2.Note: Le...read more

DSA

strings

Array Product Even or Odd

Last Updated: 17 September 2026

Given an array arr[] of integers, find if product of all its elements is even or odd.Examples:Input: arr[] = [2, 4, 3, 5]Output: EvenExplanation: Product = 2 * 4 * 3 * 5 =...read more

DSA

strings

MATHEMATICS

Two Non-Overlapping Substrings

Last Updated: 14 September 2026

Given a string s consisting of uppercase English letters, find if it contains the two substrings "XY" and "YX" such that they do not overlap with each other. The substring...read more

DSA

strings

Remove Common and Concat

Last Updated: 14 September 2026

Given two strings, s1 and s2. The task is to remove all characters that are common in both strings and then combine the remaining characters from each string to form a new...read more

DSA

Hash

strings

Count Types of Characters

Last Updated: 15 September 2026

Given a string s, count the occurrence of the following in it.Lowercase charactersUppercase charactersSpecial charactersNumeric ValuesNote: There are no white spaces in th...read more

DSA

strings

Last index of One

Last Updated: 08 September 2026

Given a string s consisting only of '0' and '1', find the last index at which '1' occurs. If '1' is not present in the string, return -1.Examples:Input: s = "01001"Output:...read more

DSA

strings

Linear Search

Check if Specific Frequency Sum is Even in String

Last Updated: 14 September 2026

Given a string s consisting of lowercase English letters, find if sum of two values x and y is even.x is the number of distinct characters that are at even positions in th...read more

Find the Smallest Greater Date with Same Digits

Last Updated: 18 August 2026

Given a date in the format dd mm yyyy, rearrange its digits to form a valid date that is greater than the given date. The new date must:Use exactly the same digits as the ...read more

DSA

date-time-program

strings

Non-Repetitive String

Last Updated: 31 July 2026

Given a string s consisting of uppercase English letters, determine whether it is a non-repetitive string. A string is called non-repetitive if every occurrence of the sam...read more

DSA

strings

Check if Any Common String Exists in Two Arrays

Last Updated: 26 July 2026

Given two arrays of strings s[] and t[] of sizes n and m, respectively, find if they share at least one common string.Examples:Input: s[] = ["cake", "pastry", "fish", "can...read more

DSA

strings

Assign Short Codes in Stream of Words

Last Updated: 20 July 2026

A railway department is renaming several cities, and the corresponding railway station codes must also be updated.Given an array cities[] containing the names of n cities ...read more

Distinct Characters In Sorted Manner

Last Updated: 18 July 2026

Given a string s, return a string containing all distinct characters from s in non-decreasing order, without using any sorting algorithm.Examples:Input: s = "abdbc"Output:...read more

Last Updated: 10 July 2026

Given a string s consisting of lowercase English letters. Each letter corresponds to a number on a standard keypad, as shown in the figure. Replace every character in s wi...read more

DSA

strings

DSA

Palindrome With K Insertions

Last Updated: 03 July 2026

Given a string s and an integer k, determine whether s can be converted into a palindrome using exactly k insertions. In a single insertion, any character may be inserted ...read more

DSA

Algorithms-Dynamic Programming

strings

1 2 3 4

...