70分，wa后3点

#include<bits/stdc++.h>
using namespace std;
long long dp[50][50],lon,a[50],l,r;
int dfs(int pos,bool lim,int lead,int cha)
{
	short temp=0;
	if(pos==0) return cha>=0;
	if(!lim&&!lead&&dp[pos][cha]!=-1) return dp[pos][cha];
	long long res=0,up=lim?a[pos]:1;
	for(int i=0;i<=up;i++){
		if(i==0)
		{
			if(lead) temp=0;
			else     temp=1;
		}
		else   temp=-1;
		res+=dfs(pos-1,lim&(i==a[pos]),lead&(i==0),cha+temp);
	}
	if(!lim&&!lead) dp[pos][cha]=res;
	return res;
}
int work(int u)
{
	lon=0;
    while(u)	a[++lon]=u%2,u/=2;
    memset(dp,-1,sizeof(dp));
	return dfs(lon,1,1,0);
}
int main()
{
	cin>>l>>r;
	cout<<work(r)-work(l-1);
	return 0;
}