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Data Structure Articles
Page 12 of 164
Print the frequency of adjacent repeating characters in a given string
A string is a data structure consisting of a sequence of characters. The end of the string is marked by a special character, called a null character, which is usually represented by the ASCII code 0. Problem Statement Given a string s of a certain length, the task at hand is to print adjacent repeating characters along with the frequency of their repetition. For Example Input: s = “committee” Output: [[m, 2], [t, 2], [e, 2]] Explanation The character m occurs consecutively twice. Similarly the character t and e also occur twice consecutively. Therefore we return the vector ...
Read MoreMinimize removals to remove another string as a subsequence of a given string
A subsequence refers to a sequence that can be obtained from another sequence by removing zero or more elements, without altering the order of the remaining elements. In simpler terms, a subsequence is derived by selecting elements from the original sequence, while preserving their relative order. For example, consider the sequence [1, 2, 3, 4]. Some possible subsequences of this sequence are: [1, 2], [1, 3, 4], [2, 4], [1, 2, 3, 4], [3], and [4]. Problem Statement The objective is to determine the minimum number of character removals from string s1 in order to eliminate any occurrence of ...
Read MoreCheck if given string is prefix subarray of the given array
A subarray of an array is a contiguous part of the array in which we take a group of consecutive elements while also maintaining the relative ordering of elements as present in the original array. Example − Some valid subarrays are − etc. A prefix subarray is a special type of subarray that begins with the first element of the array and ends at some ith index where 0
Read MoreCheck if every row in given Matrix contains all the integers from 1 to N
A matrix is a two-dimensional data structure made up of rows and columns set out like a grid of squares. Grids, multidimensional arrays, and tabular data are frequently represented using it. Problem Statement We are given a matrix of dimensions and the task is to check whether each row of the matrix consists of every number from 1 to n. The order of the numbers in the row do not matter. Return true if this statement holds true else return false. For Example Input: mtx = [[1, 2, 3], [3, 2, 1], [2, 1, 3]] Output: True ...
Read MoreMinimize replacement of characters to its nearest alphabet to make a string palindromic
In this article, we will discuss a fascinating algorithmic problem: "Minimize replacement of characters to its nearest alphabet to make a string palindromic." This problem is intriguing because it involves string manipulation, palindrome checking, and the concept of ASCII values for characters. Let's dive into the problem. Problem Statement Given a string of characters, the task is to transform it into a palindrome with the minimum number of replacements. These replacements are made by changing a character to its nearest alphabet. Understanding the Problem A palindrome is a word, phrase, number, or other sequences of characters that reads the same ...
Read MoreMinimize removal of non-equal adjacent characters required to make a given string empty
In this article, we'll be diving into a fascinating string manipulation problem. The problem statement is "Minimize removal of non-equal adjacent characters required to make a given string empty". This problem is a fantastic way to enhance your understanding of strings, character removal, and algorithmic thinking. Problem Statement Given a string, the task is to minimize the number of removal operations of non-equal adjacent characters required to make the given string empty. In one operation, you can remove any two adjacent characters that are not equal. Solution Approach The approach to solve this problem is using a stack data structure. ...
Read MoreMinimize operations to make String palindrome by incrementing prefix by 1
In this problem, we will count the number of operations required by increasing the prefix characters of the given string. We will use character difference to count the minimum number of operations required to make string palindromic. Problem Statement We have given a string nums containing the numeric digits. We need to count a minimum number of operations required to convert a string into the palindrome. In one operation, we can select any prefix of the string and increment all prefix characters by 1. Sample Example Input nums = "22434" Output 2 Explanation ...
Read MoreMinimize count of given operations required to make two given strings permutations of each other
In this article, we will discuss how to minimize the count of given operations required to make two given strings permutations of each other. We will follow a step-by-step approach and provide the codes implementation. We will also include an example test case to help understand the problem and the solution. Problem Statement Given two strings s1 and s2, we need to find the minimum number of operations required to make s1 and s2 permutations of each other. We can perform two operations: swap any two characters of s1, or swap any two characters of s2. Approach and Implementation To ...
Read MoreMinimize count of 0s required to be removed to maximize length of longest substring of 1s
In this article, we will delve into an intriguing problem that involves string manipulation. The problem we're examining today is how to "Minimize the count of 0s required to be removed to maximize the length of the longest substring of 1s". This problem is a great way to hone your skills in string manipulation and dynamic programming in various programming languages. Problem Statement Given a binary string, the task is to minimize the count of 0s required to be removed in order to maximize the length of the longest substring of 1s. Solution Approach To solve this problem, we can ...
Read MoreMaximum moves to reach destination character in a cyclic String
In this problem, we will find the maximum distance from the initial to the final character in the cyclic string. The basic approach to solve the problem is to find the next closest final character for every initial character and update the maximum distance if required. Another approach traverses the string in reverse order and keeps track the index of the last final character. When we get an initial character, we measure the distance and update the maximum distance if required. Problem statement − We have given an str string containing the 3 characters, and the length equals N. Also, ...
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