Answer to Question #310304 in Python for void

Question

Given a string of numbers S, the task is to find the maximum value from the string S, you can add a ‘+’ or ‘*’ sign between any two numbers.

For example, S=891. As 8*9*1 = 72 and 8*9+1 = 73. So, 73 is maximum.

Write a python module MaxValue.py for solve the above task. You need to import this module in your file which takes a string and return maximum value or error message as shown in example by calling the appropriate function implemented in MaxValue.py module. Also handle the possible exceptions and display the exception message in form of string.

Example-1

Input:

01231

 

Output:

10

example 2

Input:

891

 

Output:

73

example 3

Input:

0000

 

Output:

example 4

Input:

45f

 

Output:

Invalid Number

Answer 1

# MaxValue.py

def max_value(L):
    if len(L) == 1:
        return L[0]
    
    rest = max_value(L[:-1])
    x1 = L[-1] + rest
    x2 = L[-1] * rest
    if x1 > x2:
        return x1
    else:
        return x2
    
def MaxValue(s):
    L = [int(ch) for ch in s]
    return max_value(L)

# RollNo_W12B_1.py
from MaxValue import MaxValue

def main():
    S = input()
    try:
        res = MaxValue(S)
        print(res)
    except:
        print('Invalid Number')

if __name__ == '__main__':
    main()