C++ Articles - Page 119 of 719

Suppose, we are given a string s. There is a range, from start to end where start and end are both integers. Whenever we encounter the character stored in variable f within the given range, we replace it with the character stored in r. We find out the string after this replacement operation.Problem CategoryTo solve this problem, we need to manipulate strings. Strings in a programming language are a stream of characters that are stored in a particular array-like data type. Several languages specify strings as a specific data type (eg. Java, C++, Python); and several other languages specify strings ... Read More

Suppose, we are given a grid of dimensions n * n. We have to detect if there is a cross pattern in the grid, like below −#...# .#.#. ..#.. .#.#. #...#The grid can only contain '#' and '.'. We have to detect the pattern and find out how many such patterns are in the grid. The grid and the dimension are given to us as input.Problem CategoryVarious problems in programming can be solved through different techniques. To solve a problem, we have to devise an algorithm first, and to do that we have to study the particular problem in detail. ... Read More

Suppose, we are given a grid of dimensions h * w. We have to color the border cells of the grid (i.e. the outermost cells of the grid) with a special color. We have to find out how many border cells we have to color.Problem CategoryVarious problems in programming can be solved through different techniques. To solve a problem, we have to devise an algorithm first, and to do that we have to study the particular problem in detail. A recursive approach can be used if there is a recurring appearance of the same problem over and over again; alternatively, ... Read More

Suppose, there is an electronic control board that implies the status of all the components in a system. Each component status is depicted using two LEDs; if any one of them is lit then that component is working. In the board, there are n rows of LED lights, and m components status are in a particular row; that means there are 2*m LED lights in each row. A given array 'grid' depicts the status of the board, if a light is lit then it is '1', otherwise '0'. We have to find out the number of components currently working from ... Read More

Suppose, we are given two arrays a and b that each contain n integer numbers. From the arrays, we have to create integer pairs where one number is from array a and another one is from array b, and the addition of the numbers is always unique. We print all such integer pairs.Problem CategoryThe above-mentioned problem can be solved by applying Greedy problem-solving techniques. The greedy algorithm techniques are types of algorithms where the current best solution is chosen instead of going through all possible solutions. Greedy algorithm techniques are also used to solve optimization problems, like its bigger brother ... Read More

Suppose, we have n number of strings given to us in an array 'stringArr'. We iterate through the string elements one by one and find out if a string has appeared before in the array. If such occurs, we print 'Seen Before!' or otherwise, we print 'Didn't see before!'Problem CategoryTo solve this problem, we need to manipulate strings. Strings in a programming language are a stream of characters that are stored in a particular array-like data type. Several languages specify strings as a specific data type (eg. Java, C++, Python); and several other languages specify strings as a character array ... Read More

Suppose, we are given an array of n integers 'x'. We have to find out another array of integers 'y', so that x[1].y[1] + x[2].y[2] +...+ x[n].y[n] = 0. We print the contents of array y.Problem CategoryVarious problems in programming can be solved through different techniques. To solve a problem, we have to devise an algorithm first, and to do that we have to study the particular problem in detail. A recursive approach can be used if there is a recurring appearance of the same problem over and over again; alternatively, we can use iterative structures also. Control statements such ... Read More

Suppose we have two numbers n and k, There are n students in a contest. Some of them will receive memento, some will get certificates, and others won't receive anything. Who receives something are called winners. But there are some rules of counting the number of memento and certificates. The number of certificates must be exactly k times greater than the number of memento. The number of winners must not be greater than n/2. It's also possible that there are no winners. We have to identify the maximum possible number of winners, according to these rules. Then find the number ... Read More

Suppose we have a square board of order n x n. Amal and Bimal are playing a game. During the game they write numbers on the board's squares by some unknown rules. Currently the board is showing elements after ending the game. To understand who has won, we need to count the number of winning squares. A particular square is winning we should do the following. Find the sum of all numbers on the squares that share this column and separately calculate the sum of all numbers on the squares that share this row. A square is a winning square ... Read More

Suppose we have three numbers k, l and m, and have another array A with n elements. A robber failed to rob a bank but had managed to open all the safes of a bank. The blank client decides to take advantage of this failed robbery and steal some money from the safes. In a line there are many safes. There are n banknotes left in all the safes in total. The i-th banknote is in safe A[i]. The bank employee is now at safe k. There are two security guards, one of which guards the safe l such that ... Read More