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#include <algorithm>
#include <iostream>
#include <vector>
#include <queue>
using namespace std;

int main() {
    int t, n;
    cin >> t;

    while (t--) {
        cin >> n;
        priority_queue<int> vect;


        for (int j = 0; j < n; j++) {
            int x;
            cin >> x;
            vect.push(x);
        }

        while (vect.size() != 1) {
            int a = vect.top();
            vect.pop();


            int b = vect.top();
            vect.pop();

            
            int c = a + b - 1;
            vect.push(c);
        }

        cout << vect.top() << '\n';
    }

    return 0;
}
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