412.Fizz Buzz

Tags: [math]

Link: https://leetcode.com/problems/fizz-buzz/?tab=Description

Write a program that outputs the string representation of numbers from 1 ton.

But for multiples of three it should output “Fizz” instead of the number and for the multiples of five output “Buzz”. For numbers which are multiples of both three and five output “FizzBuzz”.

Example:

n = 15,
Return:
[
    "1",
    "2",
    "Fizz",
    "4",
    "Buzz",
    "Fizz",
    "7",
    "8",
    "Fizz",
    "Buzz",
    "11",
    "Fizz",
    "13",
    "14",
    "FizzBuzz"
]

Solution: math

class Solution(object):
    def fizzBuzz(self, n):
        """
        :type n: int
        :rtype: List[str]
        """
        if n <= 0:
            return []

        result = []
        for num in xrange(1, n + 1):
            if num % 15 == 0:
                result.append('FizzBuzz')
            elif num % 3 == 0:
                result.append('Fizz')
            elif num % 5 == 0:
                result.append('Buzz')
            else:
                result.append(str(num))

        return result

Revelation:

• For number is both the multiples of three and multiples of five, we can check if num % 15 == 0.

Note:

• Time complexity = O(n), n is the input.