LeetCode 412. Fizz Buzz

1부터 N까지의 숫자에서 3의 배수는 Fizz, 5의 배수는 Buzz, 모두일 경우 FizzBuzz 출력하기

Posted by : Kimtaeng on Jan 17, 2018

Description

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"
]

Reference link

Solution

import java.util.ArrayList;
import java.util.List;

/**
 * 412. FizzBuzz
 * 
 * @author kimtaeng
 * created on 2018. 1. 10.
 */

public class Solution {
    public List<String> fizzBuzz(int n) {
        List<String> list = new ArrayList<String>();
        for (int i = 1; i <= n; i++) {
            String s = "";
            if (i % 3 == 0) s = "Fizz";
            if (i % 5 == 0) s += "Buzz";
            else if (i % 3 != 0) s = i + "";
            list.add(s);
        }
        return list;
    }
}

Not using “%” Operation.

import java.util.ArrayList;
import java.util.List;

/*
 * 412. FizzBuzz
 * 
 * @author kimtaeng
 * created on 2018. 1. 10.
 */
public class Solution {
    public List<String> fizzBuzz(int n) {
        List<String> resultList = new ArrayList<String>();
        for (int i = 1, fizz = 0, buzz = 0; i <= n; i++) {
            fizz++;
            buzz++;
            if(fizz == 3 && buzz == 5) {
                resultList.add("FizzBuzz");
                fizz = 0;
                buzz = 0;
            } else if (fizz == 3) {
                resultList.add("Fizz");
                fizz = 0;
            } else if (buzz == 5) {
                resultList.add("Buzz");
                buzz = 0;
            } else {
                resultList.add(String.valueOf(i));
            }
        }
        return resultList;
    }
}