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Write a function, called numPens that takes one argument, n, and returns True if it is possible to buy a combination of 5, 8 and 24 pack unit in Python.
 one year ago
 one year ago
Write a function, called numPens that takes one argument, n, and returns True if it is possible to buy a combination of 5, 8 and 24 pack unit in Python.
 one year ago
 one year ago

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LyraeBest ResponseYou've already chosen the best response.0
How much python do you know? Do you know how to make a function? Do you have any code?
 one year ago

SyamantakBest ResponseYou've already chosen the best response.0
Yes I know how to make a function.
 one year ago

SyamantakBest ResponseYou've already chosen the best response.0
This is the exact question def numPens(n): """ n is a nonnegative integer Returns True if some nonnegative integer combination of 5, 8 and 24 equals n Otherwise returns False. """
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
@Syamantak Are you still there?
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
I think i might have a solution, but I to be honest with you I have more experience with Java, so i might not be the most optimal one.
 one year ago

SyamantakBest ResponseYou've already chosen the best response.0
Sorry the solution is not right , but nevertheless Thank You !
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
Do you have some kind of answer to compare against?
 one year ago

SyamantakBest ResponseYou've already chosen the best response.0
No there is no answer to compare against
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
Do we have to use all three of them or could we use combinations with only one or two of the diffrent packsizes? for example: n = 15 => 3*5 pack
 one year ago

SyamantakBest ResponseYou've already chosen the best response.0
We could use combination of any one any two or all three , we could also take a number twice and a number once
 one year ago

SyamantakBest ResponseYou've already chosen the best response.0
for example a=5,b=8 and c=24 and n can be anything.It must be done like a+b or 2(A+B) OR A+B+C
 one year ago

msmithhnovaBest ResponseYou've already chosen the best response.0
This is basically a variation of the old McNugget Problem. I am sure you can find lots on this on google. Here is a link to some related math, hope it helps http://www.mathnerds.com/best/mcnuggets/index.aspx
 one year ago

msmithhnovaBest ResponseYou've already chosen the best response.0
And here is McNuggets in Python, found on google. def McNuggets(n): if n == 0: return True for i in (6, 9, 20): if n >= i and McNuggets(n  i): return True return False
 one year ago

msmithhnovaBest ResponseYou've already chosen the best response.0
Slight adaption of my other post for fun. def McNuggets(sizes,n): if n == 0: return True for i in (sizes): if n >= i and McNuggets(sizes,n  i): return True return False for i in range(50): print(i,McNuggets((6,9,20),i)) for i in range(50): print(i,McNuggets((5,8,24),i))
 one year ago

msmithhnovaBest ResponseYou've already chosen the best response.0
Lyrae, the only difference in output between the two seems to be at 0, mine shows True and yours shows False. Not sure which would be considered more accurate.
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
It's probably yours, mine seem to fail at higer values(?) And also, recursive functions are awesome ;)
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
Thinking about it, is 0 even considered a possitive integer(?)
 one year ago

msmithhnovaBest ResponseYou've already chosen the best response.0
I would think no. Something interesting about the second function I posted is you can send it any set of sizes like below with 4 sizes without changing the function.. for i in range(50): print(i,McNuggets((6,9,25,31),i))
 one year ago

LyraeBest ResponseYou've already chosen the best response.0
Here're 3 different implementations of the same problem and they all preform equal. Like @msmithhnova said it's probably a slight modification on the McNuggets Problem. def numPens(n): i = 0 while i <= n: j = i; while j <= n: k = j while k <= n: if k == n: return True k += 24 j += 8 i += 5 return False def numPens(n): if n == 0: return True for i in (5, 8, 24): if n >= i and numPens(n  i): return True return False def numPens(n): if n == 0: return True elif n < 0: return False elif numPens(n  24) or numPens(n  8) or numPens(n  5): return True else: return False
 one year ago
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