[M💙 Challenge] Pyramidal Number Stacking 🔺🔢

Question

Monday Blue 💙 Challenge Series #8

Let's try to build a number triangle this week! This challenge was inspired by Pascal's triangle but we will work from bottom-to-top instead of top-to-bottom this time.

💼 TASK
Write a program to accept a list of unit digits and stack it in a triangular form. Each successive layer on top was derived from the sum of two adjacent numbers from the lower level.

🔧 EXAMPLE
[ 1, 2 ] ➡
3
1 2

[ 1, 2, 3 ] ➡
8
3 5
1 2 3

[ 0, 1, 0, 1 ] ➡
4
2 2
1 1 1
0 1 0 1

➕ EXTRA
Determine the final number on the apex without building the triangle.

❤ BONUS
Creative and clear-cut approach is encouraged.

Happy Coding!!! 😁💻

Answer 1

Here's my try.
Only the apex number:

https://code.sololearn.com/W45IpdqYeDc1/?ref=app

Added: The Triangle .
Can handle big numbers.

https://code.sololearn.com/WTGjUURQF2Yi/?ref=app

Answer 2

Thanks everyone for your participation! We got a few optimized and beautifully presented submissions this week.

I decided to pick a HTML solution by Jonathan for better illustration and I really appreciate for non-web submissions as the padding need to be considered carefully for long numbers and fast calculation of apex number as well.

In fact, you all had done a good job so please don't feel bad if your solution didn't get picked as we still got more to come!

I hope you all enjoy and let's move on to the next challenge! ❤

https://www.sololearn.com/Discuss/853905/?ref=app

Answer 3

My try -
https://code.sololearn.com/cFXFGQxF8d5L/?ref=app
Accepts inputs seperated by comma.
By the way, I need to say that this is a very nice challenge.

Answer 4

My try
Doesn't get messy with double digits
https://code.sololearn.com/cvVB8y7hGKEn/?ref=app

Answer 5

@Pegasus Yup, that's why I suggesting using unit digit as the base. Anyway some extra padding will fix the issue. 😉

Answer 6

https://code.sololearn.com/cp1oplO13AXY/?ref=app

Answer 7

Creates a centered symmetrical pyramid
https://code.sololearn.com/cDKdgkmA6TzF/?ref=app

Answer 8

Another awesome challenge

Answer 9

Numbers get messy as they get bigger though

Answer 10

here's my [late] try...🐍
the apex is evaluated before the pyramid..
https://code.sololearn.com/cdhg54019JNx/?ref=app

Answer 11

herez ittt....

https://code.sololearn.com/cR3Omk05cqW4/?ref=app

Answer 12

okk...second version
Functional One Liner.....
(( reveals the top number of the stack ))

https://code.sololearn.com/c93tcwVxK6eZ/?ref=app

Answer 13

https://code.sololearn.com/c94kBZ3r85k8/?ref=app

Answer 14

okay so it's not a tree but I'm just excited I got recursion to work...

https://code.sololearn.com/c5PBi74ud6vn/?ref=app

Answer 15

To learn and to code for these type of challenges and to show your skills.

Answer 16

Here's My try in RUBY...
Accepts input and gives output for that.
(input without commas Ex: 0101)
2nd challenge

Thanks for the challenge

https://code.sololearn.com/csMZAocdmLa7/?ref=app

Answer 17

Could i turn the input into a list of integers in a more efficient way?

https://code.sololearn.com/cVt09yOidlqA/#py

Answer 18

My solution:
https://code.sololearn.com/cTt1Gt6IuJFS/?ref=app

Answer 19

Top only without triangle
https://code.sololearn.com/cn6AjPrl5Hx8/?ref=app

Answer 20

Here is a C++ example. Is there a faster way in C++?

https://code.sololearn.com/cltH3S0rdpZU/?ref=app