DIGITS = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}
a=''
n=0
for i in range(len(s)):
    if s[i]=='.':
         n=len(s)-1-i
    else:
            a=a+s[i]

def char2num(s):
    return DIGITS[s]


result = reduce(lambda x, y: x * 10 + y, map(char2num, a))
return result/(10**n)