B. New Year and Old Property

time limit per test

2 seconds

memory limit per test

256 megabytes

input

standard input

output

standard output

The year 2015 is almost over.

Limak is a little polar bear. He has recently learnt about the binary system. He noticed that the passing year has exactly one zero in its representation in the binary system — 201510 = 111110111112. Note that he doesn't care about the number of zeros in the decimal representation.

Limak chose some interval of years. He is going to count all years from this interval that have exactly one zero in the binary representation. Can you do it faster?

Assume that all positive integers are always written without leading zeros.

Input

The only line of the input contains two integers a and b (1 ≤ a ≤ b ≤ 1018) — the first year and the last year in Limak's interval respectively.

Output

Print one integer – the number of years Limak will count in his chosen interval.

Sample test(s)

input

5 10

output

2

input

2015 2015

output

1

input

100 105

output

0

input

72057594000000000 72057595000000000

output

26

Note

In the first sample Limak's interval contains numbers 510 = 1012, 610 = 1102, 710 = 1112, 810 = 10002, 910 = 10012and 1010 = 10102. Two of them (1012 and 1102) have the described property.

解题说明：此题是一道进制转换题，求出一段区间中转换为二进制时只含有1个0的数字个数。可以先找到题目输入数据范围内所有这样的数字，然后判断是否在区间范围内。

#include<cstdio>#include <cstring>#include<cmath>#include<iostream>#include<algorithm>#include<vector>using namespace std;long long a[2000];int main() {long long c,b;int i,j,count;for ( i = 1;i<=60;i++) {for (j = 1;j<i;j++) {a[(i-2)*(i-1)/2+j] = (long long)(pow(2,i)-pow(2,j-1)-1);}}scanf("%I64d %I64d",&c,&b);count=0;for ( i = 1;i<2000;i++) {if (a[i]>=c&&a[i]<=b) {count++;}}printf("%d\n",count);return 0;}