- Practice
- Algorithms
- Bit Manipulation
- Maximizing XOR

# Maximizing XOR

# Maximizing XOR

Given two integers, and , find the maximal value of xor , written , where and satisfy the following condition:

For example, if and , then

Our maximum value is .

**Function Description**

Complete the *maximizingXor* function in the editor below. It must return an integer representing the maximum value calculated.

maximizingXor has the following parameter(s):

*l*: an integer, the lower bound, inclusive*r*: an integer, the upper bound, inclusive

**Input Format**

The first line contains the integer .

The second line contains the integer .

**Constraints**

^{3}

**Output Format**

Return the maximal value of the xor operations for all permutations of the integers from to , inclusive.

**Sample Input 0**

```
10
15
```

**Sample Output 0**

```
7
```

**Explanation 0**

The input tells us that and . All the pairs which comply to above condition are the following:

Here two pairs *(10, 13)* and *(11, 12)* have maximum xor value *7*, and this is the answer.

**Sample Input 1**

```
11
100
```

**Sample Output 1**

```
127
```