In this video below, I provide three solutions to the problem, “Count the number of prime numbers less than a non-negative number, n.”
Example:
Input: 10
Output: 4
Explanation: There are 4 prime numbers less than 10, they are 2, 3, 5, 7
In this video below, I provide three solutions to the problem, “Count the number of prime numbers less than a non-negative number, n.”
Example:
Input: 10
Output: 4
Explanation: There are 4 prime numbers less than 10, they are 2, 3, 5, 7
