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Given a five digit number N, find the digit which is repeated more than once. Let R be repeated n times in N. Let t be the value of R^n. If t is even number, then print YES, otherwise NO. If no digit is repeated then, output should be GREAT.

What I have tried:

I'm confused...what should be used to solve this?
Posted
Updated 15-Jan-23 2:55am

Quote:
I'm confused...what should be used to solve this?

Take some sample 5 digits numbers and solve the problem by hand. Take a sheet of paper and pencil and go on.
Advice: reread carefully the requirement, everything matters.
Once you master how to solve by hand, it is basically your solving algorithm.

You may have to count the number of each digit (how many 1s, 2s, 3s ...)
 
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CPallini 15-Jan-23 4:04am    
5.
Patrice T 15-Jan-23 6:42am    
Thank you
While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us to do it all for you.

So we need you to do the work, and we will help you when you get stuck. That doesn't mean we will give you a step by step solution you can hand in!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.

I'd start by reading the question: it has two parts:
1) Find the digit R that repeats (or at least find the first if there are more than one: 12321 has both 1 and 2 repeated).
2) Find how many times it repeats n
3) Calculate r^n and check if it is even or odd.

Step (3) can be simplified, but probably shouldn't because your assignment is specific. (For all positive values of x, x^n is always even if x is even, and odd if x is odd.)

So implement step 1 and test it lots - make sure it works for every input you can think of including values of N that have no repeating digit.
When that works, add code to get the count n and test that again.
When that works, look at the third step.

Do note that ^ in C is the binary XOR operator, so if your assignment expects t to be "R to the power of n" you can't use it - you will need to use the pow function or write your own code to do it.

If you are having problems getting started at all, then this may help: How to Write Code to Solve a Problem, A Beginner's Guide[^]
 
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CPallini 15-Jan-23 4:04am    
5.
The five-digit number N can be either fixed or variable by a user input. If the number is to be entered by the user, it should be checked, for which the specification of the number system would be necessary.

Presumably it would be convenient for flexible processing to store the number N in a string and then evaluate how often each of the total of 5 characters occurs. So one could use an array for a maximum of 5 characters, each with a counter.
 
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