Make them equal

#include<iostream>
using namespace std;
int main()
{
    //freopen("input.txt", "r", stdin);
    int testCase, n;
    cin >> testCase;
    for (int tc = 1; tc <= testCase; tc++)
    {
        cin >> n;
        int* a = new int[n];
        int sum = 0;
        double average = 0;
        for (int i = 0; i < n; i++)
        {
            cin >> a[i];
            sum += a[i];
        }
        average = sum * 1.0 / n;
        if (average == (int)average) cout << n << endl;
        else cout << (n-1) << endl;
    }
    return 0;
}