C++ Class Templates

Problem Statement :

A class template provides a specification for generating classes based on parameters. Class templates are generally used to implement containers. A class template is instantiated by passing a given set of types to it as template arguments. Here is an example of a class, MyTemplate, that can store one element of any type and that has just one member function divideBy2, which divides its value by 2.

template <class T>
class MyTemplate {
T element;
MyTemplate (T arg) {element=arg;}
T divideBy2 () {return element/2;}

It is also possible to define a different implementation of a template for a specific type. This is called Template Specialization. For the template given above, we find that a different implementation for type char will be more useful, so we write a function printElement to print the char element:

// class template specialization:
template <>
class MyTemplate <char> {
char element;
MyTemplate (char arg) {element=arg;}
char printElement ()
return element;

You are given a main() function which takes a set of inputs. The type of input governs the kind of operation to be performed, i.e. concatenation for strings and addition for int or float. You need to write the class template AddElements which has a function add() for giving the sum of int or float elements. You also need to write a template specialization for the type string with a function concatenate() to concatenate the second string to the first string.

Input Format

The first line contains an integer n. Input will consist of n + 1  lines where n is the number given in the first line of the input followed by n lines.

Each of the next n line contains the type of the elements provided and depending on the type, either two strings or two integers or two floating point numbers will be given. The type will be one of int, float or string types only. Out of the following two elements, you have to concatenate or add the second element to the first element.


   1 <=  n   <= 5 x 10^5
   1.0 <= value(float) <= 10.0 , where  value(float) is any float value 
   1  <= value(int)  <= 10^5,  where valueint is any int value 
   0  <=  len(string)  <= 10,  where len(string)  is the length of any string 

The time limit for this challenge is 4 seconds.

Output Format

The code provided in the code editor will use your class template to add/append elements and give the output.

Solution :


                            Solution in C :

template <class T>
class AddElements {
    T element;
    AddElements (T arg) {element=arg;}
    T add (T e2) {return element+e2;}
    T concatenate (T e2) {return element+e2;}

View More Similar Problems


An array is a type of data structure that stores elements of the same type in a contiguous block of memory. In an array, A, of size N, each memory location has some unique index, i (where 0<=i<N), that can be referenced as A[i] or Ai. Reverse an array of integers. Note: If you've already solved our C++ domain's Arrays Introduction challenge, you may want to skip this. Example: A=[1,2,3

View Solution →

2D Array-DS

Given a 6*6 2D Array, arr: 1 1 1 0 0 0 0 1 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 An hourglass in A is a subset of values with indices falling in this pattern in arr's graphical representation: a b c d e f g There are 16 hourglasses in arr. An hourglass sum is the sum of an hourglass' values. Calculate the hourglass sum for every hourglass in arr, then print t

View Solution →

Dynamic Array

Create a list, seqList, of n empty sequences, where each sequence is indexed from 0 to n-1. The elements within each of the n sequences also use 0-indexing. Create an integer, lastAnswer, and initialize it to 0. There are 2 types of queries that can be performed on the list of sequences: 1. Query: 1 x y a. Find the sequence, seq, at index ((x xor lastAnswer)%n) in seqList.

View Solution →

Left Rotation

A left rotation operation on an array of size n shifts each of the array's elements 1 unit to the left. Given an integer, d, rotate the array that many steps left and return the result. Example: d=2 arr=[1,2,3,4,5] After 2 rotations, arr'=[3,4,5,1,2]. Function Description: Complete the rotateLeft function in the editor below. rotateLeft has the following parameters: 1. int d

View Solution →

Sparse Arrays

There is a collection of input strings and a collection of query strings. For each query string, determine how many times it occurs in the list of input strings. Return an array of the results. Example: strings=['ab', 'ab', 'abc'] queries=['ab', 'abc', 'bc'] There are instances of 'ab', 1 of 'abc' and 0 of 'bc'. For each query, add an element to the return array, results=[2,1,0]. Fun

View Solution →

Array Manipulation

Starting with a 1-indexed array of zeros and a list of operations, for each operation add a value to each of the array element between two given indices, inclusive. Once all operations have been performed, return the maximum value in the array. Example: n=10 queries=[[1,5,3], [4,8,7], [6,9,1]] Queries are interpreted as follows: a b k 1 5 3 4 8 7 6 9 1 Add the valu

View Solution →