[백준] 카드 역배치 10804 C++

https://www.acmicpc.net/problem/10804

#include <iostream>
#include <vector>
using namespace std;
 
int main()
{
    ios::sync_with_stdio(false); cin.tie(NULL);
 
    vector<int> v;
    int array1[21] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
    int A, B; 
    int temp;
 
    for (int cnt = 0; cnt < 10; cnt++)
    {
        cin >> A >> B;
        for (int i = A; i <= B; i++)
        {    
            v.push_back(array1[i]);
        }
    
        for (int i = A; i <= B; i++)
        {
            temp = v[v.size() - 1];
            v.pop_back();
            array1[i] = temp;
        }
        
        v.clear();
    }
 
    for (int i = 1; i < 21; i++)
    {
        cout << array1[i] << ' ';
    }
    return 0;
}