#P926A. 2-3-numbers
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ID: 4150
Type: RemoteJudge
1000ms
256MiB
Tried: 0
Accepted: 0
Difficulty: (None)
Uploaded By:
Hydro
Tags> 2-3-numbers
No submission language available for this problem.
Description
A positive integer is called a 2-3-integer, if it is equal to 2x·3y for some non-negative integers x and y. In other words, these integers are such integers that only have 2 and 3 among their prime divisors. For example, integers 1, 6, 9, 16 and 108 — are 2-3 integers, while 5, 10, 21 and 120 are not.
Print the number of 2-3-integers on the given segment [l, r], i. e. the number of sich 2-3-integers t that l ≤ t ≤ r.
The only line contains two integers l and r (1 ≤ l ≤ r ≤ 2·109).
Print a single integer the number of 2-3-integers on the segment [l, r].
Input
The only line contains two integers l and r (1 ≤ l ≤ r ≤ 2·109).
Output
Print a single integer the number of 2-3-integers on the segment [l, r].
Samples
1 10
7
100 200
5
1 2000000000
326
Note
In the first example the 2-3-integers are 1, 2, 3, 4, 6, 8 and 9.
In the second example the 2-3-integers are 108, 128, 144, 162 and 192.