#include <iostream>

int main( void )
{
        double x, min, max, sum = 0.0;
        int n;
        for ( n = 0; n < 20 && std::cin >> x; ++n ) {
                if ( n == 0 )
                        min = max = x;
                if ( min > x )
                        min = x;
                else if ( max < x )
                        max = x;
                sum += x;
        }
        if ( n > 0 )
                std::cout << n << " numbers: max = " << max
                          << " min = " << min
                          << " average = " << sum / n << '\n';
}