For this Question: You are given an array A of size N. For all pairs (i, j) (1 <= i < j <= N), find the maximum value of A<sub>i</sub> + A<sub>j</sub> in the array.The first line of the input contains a single integer N.
The second line of the input contains N space seperated integers.

Constraints:
2 <= N <= 10<sup>5</sup>
1 <= A<sub>i</sub> <= 10<sup>9</sup>Print the maximum value of A<sub>i</sub> + A<sub>j</sub> in the array.Sample Input:
5
6 4 9 3 7

Sample Output:
16, I have written this Solution Code: #include <bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
    int n;
    cin >> n;
    vector<int> a(n);
    for(auto &i : a) cin >> i;
    sort(a.begin(), a.end());
    cout << a[n - 1] + a[n - 2];
}, In this Programming Language: C++, Now tell me if this Code is compilable or not?