#include <iostream>

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