Longest Substring Without Repeating Characters
Problem: Given a string s, find the length of the longest substring without repeating characters….
Longest Substring Without Repeating Characters
Problem: Given a string s, find the length of the longest substring without repeating characters. Example: Input: s = “abcabcbb” Output: 3 Explanation: The answer is “abc”, with the length of 3. Solution: #include <iostream> #include <unordered_map> #include <algorithm> int lengthOfLongestSubstring(std::string s) { std::unordered_map<char, int> charIndexMap; int maxLength = 0; …
Two Sum
Given an array of integers nums and an integer target, return the indices of the two numbers such that they add up to the target. You may assume that each input would have exactly one solution, and you may not use the same element twice. You can return the answer in any order. Example :…
Input and output operations in C++
Input and output operations in C++ involve reading data from the user (input) and displaying results to the user (output). The standard way of performing these operations is through the use of the cin (for input) and cout (for output) streams. Let’s explore these concepts: Input Operations: Reading Data from the User: To read data…
Variables and Data Types in C++
Variables: A variable is a named storage location in a computer’s memory that holds a value. In C++, you need to declare a variable before using it. The basic syntax for variable declaration is: data_type variable_name; Here, data_type is the type of data the variable will hold, and variable_name is the name you give to…
Introduction to C++
1.1 What is C++? C++ is a general-purpose programming language that was developed as an extension of the C programming language. It was created by Bjarne Stroustrup at Bell Laboratories in the early 1980s. C++ combines the features of low-level programming languages, such as C, with the object-oriented programming (OOP) paradigm, making it a powerful…