вектор лист normal

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <list>
#include <fstream>

using namespace std;
ifstream in("input.txt");
ofstream out("output.txt");

int main() {
    int value;
    int n;
    cin >> n;
    vector<int> a;
    list<int> b;
    for (int i = 0; i < n; i++)
    {
        cin >> value;
        a.push_back(value);
        b.push_back(value);
    }

    int x, y;
    cin >> x >> y;
    list<int>::iterator iter;
    iter = b.begin();
    for (int i = 1; i < b.size() / 2 + 1; i++) {
        iter++;
    }
    b.insert(iter, x);
    iter++;
    b.insert(iter, y);

    for (iter = b.begin(); iter != b.end(); iter++) {
        cout << *iter << " ";
    }
    cout << endl;
    a[0] = a[0] - 1;
    a[1] = a[1] - 1;
    a[a.size() - 1] = a[a.size() - 1] - 1;
    a[a.size() - 2] = a[a.size() - 2] - 1;

    for (auto it = a.begin(); it != a.end(); it++) {
        cout << *it << " ";
    }

    return 0;
}
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