Category Archives: Strings

Find a number such that sum of N with it is a Palindrome

Given a very large number N, [1 ≤ length of digit of N (n) ≤ 106], the task is to find some positive integer of… Read More

palindrome

Mathematical

Strings

Check if given Morse Code is valid

Given a string S representing a Morse Code, the task is to check is the code is valid or not. A Morse code is valid… Read More

Pattern Searching

Strings

Maximum product of first and last character of String after rotation

Given a string S of length N, the task is to find the maximum possible product of the first and the last character of the… Read More

rotation

Strings

Check if Strings can be made equal by interchanging Characters

Given an array of N strings, the task is to find if it is possible to make all the strings equal by performing the following… Read More

frequency-counting

Arrays

Strings

Enclose given Substrings of the String in parenthesis

Medium

Given a string S and a list of strings subs[] that stores the substrings of S and all the substrings are present only once, the… Read More

Why String is popular HashMap key in Java?

There are many instances when data is stored as key-value pairs. In Java, it can be achieved by “map” which is a collection. Keys usually… Read More

Java-HashMap

Picked

Strings

Count unique Strings by replacing Consonant with closest Vowel and vice versa

Given a string S consisting of lowercase English alphabets, of length N, the task is to find the total number of distinct strings that can… Read More

Mathematical

Strings

Removing trailing newline character from fgets() Input

Hard

fgets() reads a line from the specified stream and stores it into the string pointed by str. It stops when either (n – 1) characters… Read More

Picked

C Language

Strings

Effect of ‘b’ character in front of a string literal in Python

In python, the ‘b‘ character before a string is used to specify the string as a “byte string“. For example: b_str = b’Hey I am… Read More

Is String a Primitive or a Derived Type?

In this article, we are going to discuss whether String is a primitive data type or a Derived data type. Definitely, String is not a… Read More

interview-questions

Picked

Strings

Replace the given Strings starting from given indices

Basic

Given a string S on which you need to perform Q replace operations.Each replacement operation has 3 parameters: a starting index i, a source word… Read More

substring

Greedy

Strings

Count of possible Strings by replacing consonants with nearest vowel

Given a string str consisting of N letters, the task is to find the total number of strings that can be generated by replacing each… Read More

permutation

Greedy

Strings

Find and return index of given String in a Multidimensional Array

Given a multidimensional array stringArr of strings and a keyString to be found, the task is to return the coordinates/indexes of that key string in… Read More

Lexicographically smallest String by moving one Subsequence to the end

Given a string S of size N, having lowercase alphabets, the task is to find the lexicographically minimum string after moving a subsequence to the… Read More

lexicographic-ordering

subsequence

Greedy

Strings

Applications, Advantages and Disadvantages of String

Medium

String is a data structure that is similar to the array data structure in terms of representation, and implementation but in strings, we store a… Read More

Picked

Strings

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