class Solution {
public:
    vector<string> fizzBuzz(int n) {
        vector<string> ret_vec(n);
        for(int i=1; i<=n; ++i){//需要注意要从i=1开始到n
        +1
            if(i%3 == 0){
                ret_vec[i-1] += string("Fizz");
            }
            if(i%5 == 0){
                ret_vec[i-1] += string("Buzz");
            }
            if(ret_vec[i-1] == ""){
                ret_vec[i-1] += to_string(i);//需要注意把int转换成string再return
            }
        }
        return ret_vec;
    }
};

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