나누어 떨어지는 숫자 배열

#include <string>
#include <vector>
#include <algorithm>
using namespace std;

vector<int> solution(vector<int> arr, int divisor) {
    vector<int> answer;
    
    for(int i=0; i<arr.size();i++){
        if(arr[i] %divisor==0){
            answer.push_back(arr[i]);
        }
    }
    sort(answer.begin(), answer.end());

    if(answer.size()==0){
        answer.push_back(-1);
    }
    return answer;
}