Problem: Number of 1 Bits

Medium

30 min

Understand how to count the number of 1 bits in a 32-bit binary representation of an unsigned integer. This lesson helps you implement an optimized solution in constant time and space, deepening your grasp of bit manipulation techniques essential for coding interviews.

Statement

Write a function that takes a 32-bit binary representation of an unsigned integer $n$ and returns the count of its $1$ bits.

The binary representation of an unsigned integer is a sequence of $0$ s and $1$ s that represents the integer's value using base-2 notation. An example of the 32-bit binary representation of an unsigned integer $13$ is $00000000000000000000000000001101$ .

Constraint:

The input must be a 32-bit binary representation of an unsigned integer.

Note: The input is passed to the function as an unsigned integer variable. In this lesson, we have displayed it as a string of binary numbers solely for visualization purposes.

Problem: Number of 1 Bits

Medium

30 min

Statement

Write a function that takes a 32-bit binary representation of an unsigned integer $n$ and returns the count of its $1$ bits.

Constraint:

The input must be a 32-bit binary representation of an unsigned integer.

Note: The input is passed to the function as an unsigned integer variable. In this lesson, we have displayed it as a string of binary numbers solely for visualization purposes.

Problem: Number of 1 Bits

Statement

Examples

Understand the problem

Try it yourself

Problem: Number of 1 Bits

Statement

Examples

Understand the problem

Try it yourself