Level 0. 배열 만들기 3

Level 0. 배열 만들기 3

 

 

#include <iostream>
#include <vector>

using namespace std;

vector<int> solution(vector<int> arr, vector<vector<int>> intervals)
{
    vector<int> answer;

    for (vector<int>& interval : intervals)
        answer.insert(answer.end(), &arr[interval[0]], &arr[++interval[1]]);

    return answer;
}