Primary U. S. interstate highways are numbered 1-99. Odd numbers (like the 5 or 95) go north/south, and evens (like the 10 or 90) go east/west. Auxiliary highways are numbered 100-999, and service the primary highway indicated by the rightmost two digits. Thus, I-405 services I-5, and I-290 services I-90. It has to be done in python.

The solution in python.

Output:

   print("0 is not a valid interstate highway number")

Explanation:

h = int(input("enter highway number: ")) #take highway number

if(h>=1 and h<=99): #for primary highway

   if(h%2==0):

       print("I-%d is primary, going east/west" %h) #for even highway number

   else:

       print("I-%d is primary, going north/south" %h) #for odd highway number

elif(h>=100 and h<=999): #for auxiliary highway

   aux=str(h) #convert into string for fetch the rightmost number

   l=len(aux) #find the length

   val = aux[l-2]+aux[l-1] #assign value of rightmost two number

   h = int(val) #convert into integer

   if(h%2==0):

       print("I-"+aux+" is auxiliary,"+"serving I-%d, going east/west" %h)

   else:

       print("I-"+aux+" is auxiliary,"+"serving I-%d, going north/south" %h)

elif(h==0):#for 0 highway number

   print("0 is not a valid interstate highway number")

else:

   pass

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