Vector

#include <bits/stdc++.h>
using namespace std;

#define pb push_back

signed main()
{/*
    int n;
    cin >> n;
    vector<int> a(n);
    for(int i = 0; i < n; i++)
        cin >> a[i];

    sort(a.begin() , a.end());

    for(int i = 0; i < a.size(); i++)
        cout << a[i] << " ";

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

    for(int i : a)
        cout << i << " ";

    vector<int> v(5 , 7); // 7 7 7 7 7
    v.pb(8); // 7 7 7 7 7 8
    v.pb(1); // 7 7 7 7 7 8 1
    v.pb(9); // 7 7 7 7 7 8 1 9
    sort(v.begin() , v.end()); // 1 7 7 7 7 7 8 9
    v[5] = 6; // 1 7 7 7 7 6 8 9
    reverse(v.begin() , v.end()); // 9 8 6 7 7 7 7 1
    v[4] = 3; // 9 8 6 7 3 7 7 1
    sort(v.begin() , v.end()); // 1 3 6 7 7 7 8 9
    for(int i : v)
        cout << i << " ";
    cout << '\n';
    vector<int> v = {2 , 7 , 10};
    cout << v[0] << endl; // 2
    cout << v.front() << endl; // 2
    cout << *v.begin() << endl; // 2
    auto it = v.begin(); // vector<int>::iterator
    it++;
    cout << *it << endl; // 7

    it = v.end();
    it--;
    cout << *it << endl; // 10
    // 2 7 10
    int k = 2;
    it -= k;
    k--;
    it += k;
    k--;
    it += k;
    cout << *it << endl; // 7

    vector<int> v;
    if(v.empty())
        cout << "Yes" << endl;
    else
        cout << "No" << endl;


    vector<int> a(1 , 0);
    if(a.empty())
        cout << "Yes" << endl;
    else
        cout << "No" << endl;

    vector<int> v = {2 , 10 , 7 , 6};
    sort(v.rbegin() , v.rend()); // 10 7 6 2
    cout << v[1] << endl; // 7
*/
}