#include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>using namespace std;long long s, e;long long f[50];long long com(long long n, long long r){ if (n <=0) return 1; if (n - r < r) r = n - r; long long i, j, s =1; for (i =0, j =1; i < r; ++i) { s *= (n - i); for (; j <= r && s % j ==0; ++j) s /= j; } return s;}long long cal(long long a){ long long num1, num0, bit =0, ret =0; num1 = num0 =0; long long x =1; while (x <= a) { x <<=1; bit++; } for (int i =1; i < bit; i++) for (int j =0; j <= i /2-1; j++) ret += com(i -1, j); long long pos = bit; x >>=1; num1++; while (pos--, x >>=1) { if (x & a) num1++; else { num0++; continue; } for (long long i = pos -1; num1 -1+ (pos -1- i)<= num0 +1+ i && i >=0; i--) ret += com(pos -1, i); } return ret;}int main(){ scanf("%lld%lld", &s, &e); printf("%lldn", cal(e +1) - cal(s)); return 0;}
