Score : 900 points
Nukes has an integer that can be represented as the bitwise OR of one or more integers between A and B (inclusive). How many possible candidates of the value of Nukes's integer there are?
The input is given from Standard Input in the following format:
A B
Print the number of possible candidates of the value of Nukes's integer.
7 9
4
In this case, A=7 and B=9. There are four integers that can be represented as the bitwise OR of a non-empty subset of {7, 8, 9}: 7, 8, 9 and 15.
65 98
63
271828182845904523 314159265358979323
68833183630578410