Read a Binary Number

A sensor reports its readings as text made of the characters 0 and 1, sometimes with spaces that split the digits into groups to make them easier to read, like '1010 0110'. Write binary_value(bits) that returns the whole number those binary digits stand for. Spaces are ignored.

Read the digits from left to right, the way you would read a decimal number: start with a total of 0, and for each digit, double the total and add the digit. Do it yourself, digit by digit, without int(bits, 2).

Examples

binary_value("101")          # returns 5
binary_value("1111 1111")    # returns 255
binary_value("0001")         # returns 1
binary_value("1 0000 0000")  # returns 256

For "101" the total goes 0 * 2 + 1 = 1, then 1 * 2 + 0 = 2, then 2 * 2 + 1 = 5.

Constraints

• bits holds at least one digit, and at most 200 characters.