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Day 29: Bitwise AND Hackerrank Solution Java

 Day 29: Bitwise AND 

For Explanation Check Video:


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
Code:
import java.io.*;
import java.math.*;
import java.security.*;
import java.text.*;
import java.util.*;
import java.util.concurrent.*;
import java.util.function.*;
import java.util.regex.*;
import java.util.stream.*;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;

class Result {

    /*
     * Complete the 'bitwiseAnd' function below.
     *
     * The function is expected to return an INTEGER.
     * The function accepts following parameters:
     *  1. INTEGER N
     *  2. INTEGER K
     */

    public static int bitwiseAnd(int N, int K) {
    // Write your code here
    int res = 0;
    for(int i=1;i<=N;i++){//1
        for(int j=i+1;j<=N;j++){
            int ans = i&j;//1&2 = 0
            if(ans>res && ans<K){
                res = ans;
            }
        }
    }
    return res;

    }

}

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

        int t = Integer.parseInt(bufferedReader.readLine().trim());

        IntStream.range(0, t).forEach(tItr -> {
            try {
                String[] firstMultipleInput = bufferedReader.readLine().replaceAll("\\s+$""").split(" ");

                int count = Integer.parseInt(firstMultipleInput[0]);

                int lim = Integer.parseInt(firstMultipleInput[1]);

                int res = Result.bitwiseAnd(count, lim);

                bufferedWriter.write(String.valueOf(res));
                bufferedWriter.newLine();
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        });

        bufferedReader.close();
        bufferedWriter.close();
    }
}

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