DIGITS = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}   
s1,s2=s.split('.')
s2=[s2[len(s2)-n-1] for n in range(len(s2))]
def char2num(z):
    return DIGITS[z]
def fn2(x,y):
    return 10*x+y
def fn3(x,y):
    return 0.1*x+y
return reduce(fn2,map(char2num,s1))+reduce(fn3,map(char2num,s2))*0.1