Sum the two largest digits.

Are those digits to be unique?

Do it both ways.



In [1]:

    
# make a big number with many digits
s = list(str(2**100))



In [2]:

    
sorted(s)[-10:]









    Out[2]:





['6', '6', '6', '6', '7', '7', '7', '8', '9', '9']



In [3]:

    
# non-unique
sum(sorted(map(int, s), reverse=True)[:2])









    Out[3]:





18



In [4]:

    
# unique
sum(sorted(map(int, set(s)), reverse=True)[:2])









    Out[4]:





17