var dp: [Int64] = Array(repeating: 0, count: 55)

for n in 1...54 {
    dp[n] = 2*dp[n-1] + (1 << (n-1))
}

func countOne(_ N: Int64) -> Int64 {
    var res: Int64 = 0
    var n: Int64 = N
    
    for i in stride(from: 54, to: 0, by: -1) {
        let LSB: Int64 = (1 << (i-1)) & n
        
        if LSB != 0{
            res += dp[i-1]
            res += n - (1 << (i-1)) + 1
        }
        
        n &= ((1 << (i-1)) - 1)
    }
    
    return res
}

func main() {
    guard let input = readLine() else { return }
    let nums: [Int64] = input.split(separator: " ").compactMap{Int64($0)}
    
    let ans: Int64 = countOne(nums[1]) - countOne(nums[0]-1)
    print(ans)
}

main()