S001-AC.cc
473 Bytes
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
int m, n;
double num, min, max, avg;
cin >> m;
for(int i = 0; i < m; i++)
{
cin >> n;
cin >> max;
min = max;
avg = max;
for(int j = 1; j < n; j++)
{
cin >> num;
if(num > max)
{
max = num;
}
if(num < min)
{
min = num;
}
avg += num;
}
avg /= n;
cout << fixed << setprecision(4) << min << " " << max << " " << avg << endl;
}
return 0;
}