hacker rank cpp programming solutions

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5 min readNov 11, 2021

Deque-STL in C++ - Hacker Rank Solution

You inherited a piece of code that performs username validation for your company's website. The existing function works…

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Print Pretty in C++ - Hacker Rank Solution

Your manager gave you a text file with many lines of numbers to format and print. For each row of 3 space-separated…

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Maps-STL in C++ - Hacker Rank Solution

Maps are a part of the C++ STL. Maps are associative containers that store elements formed by a combination of a key…

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Lower Bound-STL in C++ - Hacker Rank Solution

You are given N integers in sorted order. Also, you are given Q queries. In each query, you will be given an integer…

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Sets-STL in C++ - Hacker Rank Solution

Sets are a part of the C++ STL. Sets are containers that store unique elements following a specific order. Here are…

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Vector-Erase in C++ - Hacker Rank Solution

You are provided with a vector of N integers. Then, you are given 2 queries. For the first query, you are provided with…

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Vector-Sort in C++ - Hacker Rank Solution

You are given N integers. Sort the N integers and print the sorted order.Store the N integers in a vector. Vectors are…

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Abstract Classes - Polymorphism in C++ - Hacker Rank Solution

Abstract base classes in C++ can only be used as base classes. Thus, they are allowed to have virtual member functions…

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Virtual Functions in C++ - Hacker Rank Solution

This problem is to get you familiar with virtual functions. Create three classes Person, Professor and Student. The…

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Exceptional Server in C++ - Hacker Rank Solution

Your friend set up a small computational server that performs complex calculations.It has a function that takes 2 large…

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Inherited Code in C++ - Hacker Rank Solution

You inherited a piece of code that performs username validation for your company's website. The existing function works…

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Box it! - Hacker Rank Solution

Apart from the above, the class should have 4 functions: int getLength() - Return box's length int getBreadth() …

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Magic Spells in C++ - Hacker Rank Solution

You are battling a powerful dark wizard. He casts his spells from a distance, giving you only a few seconds to react…

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Accessing Inherited Functions in C++ - Hacker Rank Solution

You are given three classes A, B and C. All three classes implement their own version of func.

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Multi Level Inheritance in C++ - Hacker Rank Solution

Solve the problem Inheritance-Introduction before solving this problem. In the previous problem we learned about…

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Rectangle Area in C++ - Hacker Rank Solution

Create two classes: Rectangle The Rectangle class should have two data fields-width and height of int types. The class…

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Inheritance Introduction in C++ - Hacker Rank Solution

One of the important topics of Object Oriented Programming is Inheritance. Inheritance allows us to define a class in…

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Classes and Objects - Hacker Rank Solution

A class defines a blueprint for an object. We use the same syntax to declare objects of a class as we use to declare…

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Messages Order in C++ - Hacker Rank Solution

In real life applications and systems, a common component is a messaging system. Thea idea is that a sender sends…

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Overloading Ostream Operator in C++ - Hacker Rank Solution

The task is to overload the > first_name >> last_name >> event; auto p = Person(first_name, last_name); cout << p << "…

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Class in C++ - Hacker Rank Solution

Classes in C++ are user defined types declared with keyword class that has data and functions . Although classes and…

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Structs in C++ - Hacker Rank Solution

struct is a way to combine multiple fields to represent a composite data structure, which further lays the foundation…

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Cpp exception handling in C++ - Hacker Rank Solution

In this challenge, the task is to debug the existing code to successfully execute all provided test files. You are…

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Hotel Prices in C++ - Hacker Rank Solution

In this challenge, the task is to debug the existing code to successfully execute all provided test filesThe given code…

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Strings in C++ - Hacker Rank Solution

C++ provides a nice alternative data type to manipulate strings, and the data type is conveniently called string. Some…

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StringStream in C++ - Hacker Rank Solution

stringstream is a stream class to operate on strings. It basically implements input/output operations on memory…

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Attribute Parser in C++ - Hacker Rank Solution

We have defined our own markup language HRML. In HRML, each element consists of a starting and ending tag, and there…

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Variable Sized Arrays in C++ - Hacker Rank Solution

Consider an n-element array, a , where each index i in the array contains a reference to an array of ki integers (where…

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Functions in C++ - Hacker Rank Solution

Functions are a bunch of statements glued together. A function is provided with zero or more arguments, and it executes…

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Bit Array in C++ - Hacker Rank Solution

You are given four integers: N, S, P, Q. You will use them in order to create the sequence a with the following…

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C++ Variadics in C++ - Hacker Rank Solution

A template parameter pack is a template parameter that accepts zero or more template arguments (non-types, types, or…

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C++ Class Template Specialization in C++ - Hacker Rank Solution

You are given a main function which reads the enumeration values for two different types as input, then prints out the…

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Arrays Introduction in C++ - Hacker Rank Solution

An array is a series of elements of the same type placed in contiguous memory locations that can be individually…

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Attending Workshops in C++ - Hacker Rank Solution

A student signed up for n workshops and wants to attend the maximum number of workshops where no two workshops overlap…

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Pointer in C++ - Hacker Rank Solution

In this challenge, you will learn to implement the basic functionalities of pointers in C. A pointer in C is a way to…

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Overload Operators in C++ - Hacker Rank Solution

You are given a class - Complex. Operators are overloaded by means of operator functions, which are regular functions…

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Operator Overloading in C++ - Hacker Rank Solution

Classes define new types in C++. Types in C++ not only interact by means of constructions and assignments but also via…

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For Loop in C++ - Hacker Rank Solution

A for loop is a programming language statement which allows code to be repeatedly executed.The syntax for this is…

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Conditional Statements in C++ - Hacker Rank Solution

if and else are two of the most frequently used conditionals in C/C++, and they enable you to execute zero or one…

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Preprocessor Solution in C++ - Hacker Rank Solution

Preprocessor directives are lines included in the code preceded by a hash sign (#). These lines are directives for the…

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Basic Data Types in C++ - Hacker Rank Solution

Some C++ data types, their format specifiers, and their most common bit widths are as follows: Reading To read a data…

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C++ Class Templates in C++ - Hacker Rank Solution

A class template provides a specification for generating classes based on parameters. Class templates are generally…

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Input and Output - Hacker Rank Solution

In this challenge, we're practicing reading input from stdin and printing output to stdout.In C++, you can read a…

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