This article offers a thorough method for creating a lexicographically short N−length number string, where each digit must have an odd count. We offer an in−depth explanation of the problem statement, suggest a successful algorithmic strategy, and put it into practice using C++. The efficiency of the solution is revealed by the complexity analysis, and the accuracy and efficacy of the method are illustrated by an explanation using a test scenario Problem Statement Given a positive integer N, the task is to generate the smallest numeric string of size N which follows the lexicographical order, where each digit in the ... Read More

Finding the largest number that can be produced by concatenating K numbers from a given array is an exciting problem in the area of numerical manipulation and algorithmic difficulties. The sequence of concatenation must be carefully considered in this challenge because it affects the largest number's value. The complexity of the "Maximum Possible Number with Concatenations of K Numbers from a Given Array" problem is explored in this article. We will investigate a step-by-step method, and look at the C++ algorithmic implementation. By the end of this article, readers will have a thorough understanding of how to approach this issue ... Read More

When dealing with string manipulation problems, it's common to encounter scenarios where we need to transform a given string into a specific pattern or format. One such problem is making a palindrome binary string with a certain number of '0's and '1's while replacing wildcard characters represented by '?'. In this article, we will explore an efficient algorithmic approach to solve this problem using C++. We'll discuss the problem statement, and its approach, and analyze the time and space complexity of the algorithm. Problem Statement Given a string consisting of '0's, '1's, and wildcard characters '?', we need to convert ... Read More

The analysis and manipulation of strings are fundamental operations in many applications of computer programming. Counting subsequences with the pattern "01" in a string formed by repetitively concatenating a given numeric string poses an interesting challenge. The primary question is determining the total count of such subsequences in the resulting string. This article discusses a useful C++ approach to solve this issue successfully and offers a solid answer to deal with this particular work. Concept of Subsequence A subsequence is a sequence of characters that is derived from some other sequence by eliminating zero or more characters without altering the ... Read More

In order to find the single−digit sum of the alphabetical values of a string, we will explore the alphabetical values of a string and assign numerical values to letters of the alphabet. We will jump into the concept and an example to illustrate the steps involved, the algorithm behind this process, an example code implementation in C++, and finally a brief conclusion involving the significance of this technique. Concept The idea rotates around associating numerical values with each letter and performing arithmetic operations to calculate the single−digit sum i.e. 'A'=1 or 'a'=1, 'B'=2 or 'b'=2, and so on. By converting ... Read More

In this problem, we will count the maximum number of 10 and 01 pairs that can be formed using the given binary string. To solve the problem, we can check the number of 10 and 01 pairs we can form using adjacent characters without sharing any characters in two pairs. Problem Statement We have given a bin_str binary string. We need to count the maximum number of 10 and 01 pairs we can make using the adjacent characters only. Also, we can use one character in any single pair. Two pairs can't share a single character. Sample Examples Input ... Read More

In this problem, we will find the index value for each pair such that the resultant pair's average value is just greater than the current pair's average value. To solve the problem, we will use the sorting algorithm and binary search technique. We will use a sorting algorithm to sort the array based on the pair's average value and a binary search algorithm to search a pair with a greater average value from the sorted array. Problem Statement We have given a pairs[] array containing the N pairs of positive integers. It is also given that the first element of ... Read More

In this problem, we will count the number of unique strings we can generate by replacing each vowel with the closest consonant and each consonant with the closest vowel. We can find the number of choices for each character of the string to replace the current character with other characters. After that, we can multiply the number of choices of each character to get the answer. Problem Statement We have given an alpha string. We need to count the total number of different strings we can generate from the given string by performing the below operations on each character of ... Read More

Keywords are important in any programming language, as they are reserved words with a particular predefined meaning. The keywords are used to define the variables, function, and class, change the program's control flow, traverse the list, etc. When we talk about the 'String', it is a fundamental data type to represent a series of characters. Some programming languages refer to the 'String' as a class, and some programming languages refer to the 'String' as a keyword. In this tutorial, we will explore the use of the 'String' word in the programming language. C/C++ The C or C++ programming languages are ... Read More

In this problem, we need to print the element from the given index after rotating the array for K times. This problem teaches us to find the element from the particular index in the rotational array. At first sight, the solution that comes to mind is that rotate the array for K times and access the Mth element, but we will also learn to access the Mth element in the rotational array without rotating the array. Problem Statement We have given arr[] array containing N numbers. Also, we have given the positive integer M and K. We need to rotate ... Read More