ss=s.split('.')

    DIGITS = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}

    def char2num(a):

        return DIGITS[a]

    ss1=reduce(lambda x,y:10*x+y,map(char2num,ss[0]))

    temp=ss[1][::-1]

    ss2=reduce(lambda x,y:0.1*x+y,map(char2num,temp))

    return ss1+0.1*ss2