Bitwise Operators in C Hackerrank solution

 

In this challenge, you will use logical bitwise operators. All data is stored in its binary representation. The logical operators, and C language, use  to represent true and  to represent false. The logical operators compare bits in two numbers and return true or false,  or , for each bit compared.

• Bitwise AND operator & The output of bitwise AND is 1 if the corresponding bits of two operands is 1. If either bit of an operand is 0, the result of corresponding bit is evaluated to 0. It is denoted by &.

• Bitwise OR operator | The output of bitwise OR is 1 if at least one corresponding bit of two operands is 1. It is denoted by |.

• Bitwise XOR (exclusive OR) operator ^ The result of bitwise XOR operator is 1 if the corresponding bits of two operands are opposite. It is denoted by .

For example, for integers 3 and 5,

3 = 00000011 (In Binary)
5 = 00000101 (In Binary)

AND operation        OR operation        XOR operation
  00000011             00000011            00000011
& 00000101           | 00000101          ^ 00000101
  ________             ________            ________
  00000001  = 1        00000111  = 7       00000110  = 6

You will be given an integer , and a threshold, i1nnik$. Print the results of the and, or and exclusive or comparisons on separate lines, in that order.

Example

The results of the comparisons are below:

a b   and or xor
1 2   0   3  3
1 3   1   3  2
2 3   2   3  1

For the and comparison, the maximum is . For the or comparison, none of the values is less than , so the maximum is . For the xor comparison, the maximum value less than  is . The function should print:

2
0
2

Function Description

Complete the calculate_the_maximum function in the editor below.

calculate_the_maximum has the following parameters:

• int n: the highest number to consider
• int k: the result of a comparison must be lower than this number to be considered

Prints

Print the maximum values for the and, or and xor comparisons, each on a separate line.

Input Format

The only line contains  space-separated integers,  and .

Constraints

Sample Input 0

5 4

Sample Output 0

2
3
3

Explanation 0

All possible values of  and  are:

10. • The maximum possible value of  that is also  is , so we print  on first line.

    • The maximum possible value of  that is also  is , so we print  on second line.

    • The maximum possible value of  that is also  is , so we print  on third line.

Solution

#include <stdio.h>
int main()
{
    int n, k;
    scanf("%d %d", &n, &k);
    int mxAnd = 0, mxOr = 0, mxXor = 0;
    for(int i = 1; i <= n; i++){
        for(int j = i + 1; j <= n; j++){
            if(mxAnd < (i & j) && (i & j) < k)
                mxAnd = i & j;
            if(mxOr < (i | j) && (i | j) < k)
                mxOr = i | j;
            if(mxXor < (i ^ j) && (i ^ j) < k)
                mxXor = i ^ j;
        }
    }
    printf("%d\n", mxAnd);
    printf("%d\n", mxOr);
    printf("%d\n", mxXor);
    return 0;
}