WCIPEG Max Flow (C++)

#include <iostream>

using namespace std;

int main()
{
    int t, n, a, b;

    cin >> t;

    for (int i = 0; i < t; i++)
    {
        cin >> n;
        b = 0;

        for (int f = 0; f < n; f++)
        {
            cin >> a;
            if (a > b)
            {
                b = a;
            }
        }
        cout << b << endl;
    }
    return 0;
}