#include <iostream>
#include <iomanip>
using namespace std;

int main() {
	cout << fixed << setprecision(2);
	int n, m, tmp, sumGl, sumMin, sumMax, valMin, valMax, countMin, countMax;
	cin >> n >> m;
	for(int j = 0 ; j < m ; j++){
		sumGl = sumMin = sumMax = 0;
		valMin = 11;
		valMax = 0;
		countMin = countMax = 0;
		for(int i = 0 ; i < n; i++) {
			cin >> tmp;
			sumGl += tmp;
			if(tmp < valMin) {
				sumMin = tmp;
				valMin = tmp;
				countMin = 1;
			}
			else if(tmp == valMin) {
				sumMin += tmp;
				countMin++;
			}
			if(tmp > valMax) {
				sumMax = tmp;
				valMax =tmp;
				countMax = 1;
			}
			else if(tmp == valMax) {
				sumMax += tmp;
				countMax++;
			}
		}
		cout << (sumGl - sumMax - sumMin) / (double)(n - countMax - countMin) << " ";
	}
	return 0;
}