Number of 1 Bits - InterviewBit Solution
Problem: Number of 1 Bits
Problem Description:
Given a number, count the number of set bits.
Example:
The 32-bit integer 11 has binary representation
00000000000000000000000000001011
so the function should return 3
Solution Approach:
To solve this problem we can keep dividing it by 2, whenever the remainder is 1, that means there is a set bit, so increment the count.
Space & Time Complexity:
Time Complexity: O(logN)
- Since each time we are diving the number by 2.
Space Complexity: O(1)
Solution:
Code in C++
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