In this problem, we need to find the total time required to complete all tasks according to the given condition. We can use the map data structure to solve the problem. We can keep tracking the last performed time for each task, and if the time interval is less than K, we can increment time units accordingly. Problem statement – We have given a string task containing alphabetical characters of length N. Each character represents a task, and we need one unit of time to perform the tasks. Also, the condition is that each task should be performed at ... Read More

We have given two strings and need to convert one string to another by click increments, and we can increment characters by either 1 or k in the single operation. To solve the problem, we need to make all characters of the first string the same as a second character by performing the cyclic increment operations. If the character at the same index in both strings is the same, we don’t need to perform any increment operation. Problem statement – We have given two strings named first and second containing the uppercase alphabetical characters. The length of both strings ... Read More

In this problem, we need to find the maximum length of the subsequence containing the single character by increasing the multiple characters by, at most, k times. We can use the sliding window approach to solve the problem. We can find the maximum length of any window to get the result after sorting the string. Problem statement – We have given string str containing lowercase alphabetical characters. Also, we have given the positive integer k. After performing the at most k increment operations with multiple characters of the given string, we need to find the maximum length of the ... Read More

In this problem, we need to generate a lexicographically smallest string using the first K characters of alphabets so that it doesn’t contain any repeated substring. We can generate a string so that all substrings of length 2 are unique. So, if all substrings of length 2 are unique, all substrings of length 3 or more are also unique. Problem statement – We have given a positive integer K. We need to generate a new string using the first K alphabets so that generated string can’t contain any repeated substring of length 2 or more and is lexicographically smallest. Sample ... Read More

In this problem, two players play a game by removing the string from their array, which is not already removed from the opponent's array. We need to decide the winner of the game. We can solve the problem using two different approaches. In the first approach, we can store the common strings with the set data structure. In the second approach, we can use a set to store already removed strings from both arrays. Problem statement – We have given two arrays called arr and brr. The size of the array is N and M, respectively. We need to decide ... Read More

In this problem, we have given a string suggesting the moving direction and starting coordinates. We need to find the revisited positions. We can use the set or map data structure to store the previously visited coordinates. We can say that position is revisited if we find any pair in the set or map. Problem statement – We have given a string str of length N containing the ‘L’, ‘R’, ‘U’, and ‘D’ characters. Also, we have given X and Y integers representing the starting position. We need to find the total number of coordinates revisited while following the path ... Read More

In this problem, we need to count the total occurrences of the substring X in the str when we find the substring Y in the given string. We can keep counting the occurrences of the substring X, and when we get the substring Y, we can print the count value. Problem statement – We have given a string str, X, and Y. The length of the strings is N, A, and B, respectively. We need to total the total number of substring X in the given string str before every occurrence of the substring Y. Sample examples Inputstr = "stuxystuxy"; ... Read More

C++ contains many precious features to enhance the performance of the code, and string_view class is one of them. It is introduced to create a lightweight and non-owning reference to a string. In this tutorial, we will discuss the string_view class and explore a few examples using the string_view class over the string class in C++. What is string_view? The string_view is a class in C++ that is used to create a read-only sequence of the string. It is a non-owning string type, meaning it does not manage the memory associated with the string and its reference. It acts as ... Read More

In this problem, we need to check whether we can get the valid balanced subsequence of the parenthesis by moving at most K characters of the string at the end. To solve the problem, we can use the stack data structure. The logic to solve the problem is that if we find more than K ‘)’ (closing parenthesis) before the ‘(‘ (opening parenthesis), we can’t make a string into a valid subsequence. Problem statement – We have given string str containing the ‘(‘ and ‘)’ sequence of parenthesis. The length of the string is N. Also, We have given a ... Read More

In this problem, we have given a string, and we need to divide the string into k + 1 substrings such that the concatenation of k + 1 substrings with their reverse can give us the original string. Observation can solve the problem. If the string's first and last k characters are the same, we can say it is possible to create a k + 1 string according to the given condition. Problem statement – We have given a string of length N containing the lowercase alphabetical characters and positive integer K. We need to find whether we can ... Read More