https://github.com/algerina/mob_programing_28_04

Mob-programing: Solving a problem from Hackerrank "Viral advertising" using Ruby
https://github.com/algerina/mob_programing_28_04

hackerrank hackerrank-solutions mob-programming ruby

Last synced: 20 days ago
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Mob-programing: Solving a problem from Hackerrank "Viral advertising" using Ruby

• Host: GitHub
• URL: https://github.com/algerina/mob_programing_28_04
• Owner: algerina
• Created: 2022-04-28T14:57:23.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2022-04-28T15:01:16.000Z (almost 3 years ago)
• Last Synced: 2024-12-17T16:49:19.064Z (about 2 months ago)
• Topics: hackerrank, hackerrank-solutions, mob-programming, ruby
• Language: Ruby
• Homepage: https://www.hackerrank.com/challenges/strange-advertising/problem?isFullScreen=true
• Size: 7.81 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
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# Viral Advertising with Ruby

HackerLand Enterprise is adopting a new viral advertising strategy. When they launch a new product, they advertise it to exactly  people on social media.

On the first day, half of those  people (i.e., ) like the advertisement and each shares it with  of their friends. At the beginning of the second day,  people receive the advertisement.

Each day,  of the recipients like the advertisement and will share it with  friends on the following day. Assuming nobody receives the advertisement twice, determine how many people have liked the ad by the end of a given day, beginning with launch day as day .

Example

.

Day Shared Liked Cumulative

1      5     2       2

2      6     3       5

3      9     4       9

4     12     6      15

5     18     9      24

The progression is shown above. The cumulative number of likes on the  day is .

Function Description

Complete the viralAdvertising function in the editor below.

viralAdvertising has the following parameter(s):

int n: the day number to report

Returns

int: the cumulative likes at that day

Input Format

A single integer, , the day number.