- Prepare
- Tutorials
- 30 Days of Code
- Day 29: Bitwise AND

# Day 29: Bitwise AND

# Day 29: Bitwise AND

- Prepare
- Tutorials
- 30 Days of Code
- Day 29: Bitwise AND

**Objective**

Welcome to the last day! Today, we're discussing bitwise operations. Check out the Tutorial tab for learning materials and an instructional video!

**Task**

Given set . Find two integers, and (where ), from set such that the value of is the maximum possible *and also less than a given integer, *. In this case, represents the *bitwise AND* operator.

**Function Description**

Complete the *bitwiseAnd* function in the editor below.

*bitwiseAnd* has the following paramter(s):

- *int N:* the maximum integer to consider

- *int K:* the limit of the result, inclusive

**Returns**

- *int:* the maximum value of within the limit.

**Input Format**

The first line contains an integer, , the number of test cases.

Each of the subsequent lines defines a test case as space-separated integers, and , respectively.

**Constraints**

**Sample Input**

STDIN Function ----- -------- 3 T = 3 5 2 N = 5, K = 2 8 5 N = 8, K = 5 2 2 N = 8, K = 5

**Sample Output**

```
1
4
0
```

**Explanation**

All possible values of and are:

The maximum possible value of that is also is , so we print on a new line.