412. Fizz Buzz

直接判断每个整数能否被3或者5整除：

class Solution {
public:
    vector<string> fizzBuzz(int n) {
        vector<string> res;
        for(int i=1;i<=n;i++)
        {
            if(i%3==0&&i%5!=0)
                res.push_back("Fizz");
            else
                if(i%3!=0&&i%5==0)
                    res.push_back("Buzz");
            else
                if(i%3==0&&i%5==0)
                    res.push_back("FizzBuzz");
            else
                res.push_back(to_string(i));
                    
        }
        return res;
    }
};