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Bitwise And - Problem Solving (Intermediate) | HackerRank
Bitwise and .
Given an array of non-negative integers, count the number of unordered pairs of array elements such that their bitwise AND is a power of 2.
For example, let's say the array is arr = [10, 7, 2, 8, 3), and let '&' denote the bitwise AND operator. There are 6 unordered pairs of its elements that have a bitwise AND that is a power of two:
• For indices (0,1), 10 & 7 = 2, which is a power of 2.
• For indices (0,2), 10 & 2 = 2, which is a power of 2.
• For indices (0,3), 10 & 8 = 8, which is a power of 2.
• For indices (0,4), 10 & 3 = 2, which is a power of 2.
• For indices (1,2), 7 & 2 = 2, which is a power of 2.
• For indices (2,4), 2 & 3 = 2, which is a power of 2.
Therefore, the answer is 6.
Function Description
Complete the function countPairs in the editor below.
i nt arr[n]: an array of integers
Returns:
int: the number of unordered pairs of elements of arr such that their bitwise AND is a power of 2
Constraints
• 1sns 2*105
• Os arr[i]<212
Solution in Python:
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HackerRank The Maximum Subarray problem solution
In this HackerRank The Maximum Subarray problem solution we have given an array and we need to find the maximum possible sum among all nonempty subarrays and all nonempty subsequences and then print the two values as space-separated integers on one line.
Problem solution in Python.
Problem solution in java., problem solution in c++., problem solution in c..
Posted by: YASH PAL
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Bitwise AND. Given an array of non-negative integers, count the number of unordered pairs of array elements such that their bitwise AND is a power of 2. For example, let's say the array is arr = [10, 7, 2, 8, 3), and let '&' denote the bitwise AND operator. There are 6 unordered pairs of its elements that have a bitwise AND that is a power of two:
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HackerRank The Maximum Subarray problem solution. YASH PAL July 24, 2021. In this HackerRank The Maximum Subarray problem solution we have given an array and we need to find the maximum possible sum among all nonempty subarrays and all nonempty subsequences and then print the two values as space-separated integers on one line.
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