原题链接在这里：https://leetcode.com/problems/fizz-buzz/

题目：

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

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"

]

题解：

从1到n, 当前数能否被15, 5, 3整除，添加对应String. 均不能整除添加当前数.

Time Complexity: O(n). Space: O(1) regardless res.

AC Java:

 public class Solution {

     public List<String> fizzBuzz(int n) {

         List<String> res = new ArrayList<String>();

         for(int i = 1; i<=n; i++){

             if(i%5 == 0 && i%3 == 0){

                 res.add("FizzBuzz");

             }else if(i%5 == 0){

                 res.add("Buzz");

             }else if(i%3 == 0){

                 res.add("Fizz");

             }else{

                 res.add(String.valueOf(i));

             }

         }

         return res;

     }

 }