Below you will find pages that utilize the taxonomy term “Basic”

Practices

Contains Duplicate

Problem Link

Problem Statement

Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct.

Example 1:

Input: nums =

\[1,2,3,1\]

Output: true

Example 2:

Input: nums =

\[1,2,3,4\]

Output: false

Example 3:

Input: nums =

\[1,1,1,3,3,4,3,2,4,2\]

Output: true

Solutions:

1. Brute force

Given that we have an array of elements to identify if a given element is duplicated, we will compare the element with the rest of the array and this needs to be done for all the elements in the array.

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November 5, 2021

Introduction To Data Structures

structures with nodes

In this post we are going to look at

  • What are Data Structures and Abstract Data Types
  • Why do we need them
  • How can we create our own simple ADT

Let’s get started

What are Data Structures and Abstract Data Types and Why do we need them

In any program there are lots of operations being performed ranging from simple addition to complex ones. These operations have a very basic thing in common regardless of their scale.

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September 5, 2021

Number Systems

numbers combination lock

Number Systems

Here we are going to take a look at the following Number systems which are used extensively in computer science

  • Decimal
  • Binary
  • Octal
  • Hexadecimal

Introduction

Basically, all the systems are used for counting, thus allowing humans to measure things.

Every system that we are going to see will have a radix/base.

Radix / Base - the number of unique digits, including the digit zero, used to represent numbers [1]

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