#include <iostream> 
#include <iomanip> 
using namespace std; 
 
double res(int *arr, int len) {
	int min,max;
	min = arr[0];
	max = arr[0];
	for(int i = 1; i < len; i++) {
		if(arr[i] > max) {
			max = arr[i];
		}   
		if(arr[i]<min) {
			min = arr[i];
		}
	}
	int sum = 0;
	int count = 0;
	for(int i = 0; i < len; i++) {
		if(arr[i] != max && arr[i] != min) {
			sum += arr[i];
			count++;
						}
	}  
	return sum/((double)count);
 
} 
 
int main() {  
	int m, n;
	cin >> n >> m;
	cout << fixed << setprecision(2);
	for(int i = 0; i < m; i++) {
		int* arr = new int[n];
		for(int j = 0 ; j < n; j++) {
			cin >> arr[j];
		}
		cout << res(arr, n) << " ";
	}
	return 0;
}

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