## Problem 089

A place to air possible concerns or difficulties in understanding ProjectEuler problems. This forum is not meant to publish solutions. This forum is NOT meant to discuss solution methods or giving hints how a problem can be solved.
Forum rules
As your posts will be visible to the general public you
are requested to be thoughtful in not posting anything
that might explicitly give away how to solve a particular problem.

This forum is NOT meant to discuss solution methods for a problem.

In particular don't post any code fragments or results.

Don't start begging others to give partial answers to problems

Don't ask for hints how to solve a problem

Don't start a new topic for a problem if there already exists one

Don't post any spoilers
Junglemath
Posts: 54
Joined: Fri Sep 20, 2019 1:25 pm
Location: Minsk

### Re: Problem 089

Why is this note

"Note: You can assume that all the Roman numerals in the file contain no more than four consecutive identical units."

included in the problem statement? Why can't we have more than four consecutive identical units?

kenbrooker
Posts: 156
Joined: Mon Feb 19, 2018 3:05 am
Location: Northern California, USA

### Re: Problem 089

Some "rules" for Roman Numerals even state -- A numeral can be repeated in succession up to three times only.

Allowing only four repetitions at least avoids the conflation "VIIIII" = Ten vs "X" = Ten...

Just some random thoughts...
"Good Judgment comes from Experience;
..."

Junglemath
Posts: 54
Joined: Fri Sep 20, 2019 1:25 pm
Location: Minsk

### Re: Problem 089

kenbrooker wrote:
Thu May 21, 2020 6:34 pm
Some "rules" for Roman Numerals even state -- A numeral can be repeated in succession up to three times only.

Allowing only four repetitions at least avoids the conflation "VIIIII" = Ten vs "X" = Ten...

Just some random thoughts...
True. Although allowing more than 4 would prevent clever people from solving it by hand.

kenbrooker
Posts: 156
Joined: Mon Feb 19, 2018 3:05 am
Location: Northern California, USA

### Re: Problem 089

Is there something... Evil about cleverness that I am not aware of?
That needs to be "prevent"ed?!

Surely you jest?
"Good Judgment comes from Experience;
..."

Junglemath
Posts: 54
Joined: Fri Sep 20, 2019 1:25 pm
Location: Minsk

### Re: Problem 089

kenbrooker wrote:
Thu May 21, 2020 11:05 pm
Is there something... Evil about cleverness that I am not aware of?
That needs to be "prevent"ed?!

Surely you jest?
Nothing wrong with cleverness, but I do think that one of the qualifications for a problem to make it to PE is that it should be a true combination of math and programming, so a problem shouldn't be solvable without a computer doing at least some computation.

kenbrooker
Posts: 156
Joined: Mon Feb 19, 2018 3:05 am
Location: Northern California, USA

### Re: Problem 089

I guess that's the strict interpretation of--
A website dedicated to the puzzling world of mathematics AND programming
Clever hand-solutions no doubt include mathematics or pure logic but, not programming...

A website dedicated to the puzzling WORLDS of mathematics and programming
would be a Superset, welcoming hand solutions,
I guess...
"Good Judgment comes from Experience;
..."

pjt33
Posts: 32
Joined: Mon Oct 06, 2008 6:14 pm

### Re: Problem 089

Junglemath wrote:
Fri May 22, 2020 12:31 am
Nothing wrong with cleverness, but I do think that one of the qualifications for a problem to make it to PE is that it should be a true combination of math and programming, so a problem shouldn't be solvable without a computer doing at least some computation.
The compromise position is to include the traditional meaning of the word "computer", which would include Euler himself. This Roman numerals problem requires processing a text file, and is worth automating, but there's a later Roman numerals problem which can be solved on one sheet of A4 or US Letter paper if you're tidy.

kenbrooker
Posts: 156
Joined: Mon Feb 19, 2018 3:05 am
Location: Northern California, USA

### Re: Problem 089

And if Euler was married, I guess he was subordinated to "programming"...
"Good Judgment comes from Experience;