Problem 2270. Bit calculation

Give me the count of numbers from 1 to n having their last two bits as 0.

For example

function y = ret_count(4)

y = x;

end

Here 4 means you have to check the numbers between 1 to 4.

So the answer will be 1 as binary value of 4 is 00000100.

Here n in the function is the number of numbers to be checked starting from 1.