#include<bits/stdc++.h>
using namespace std;
int main() {
	double n,max = -1e9,min = 1e9,sum = 0,cnt = 0;
	for (double i = 1; ; i++) {
		cin >>n;
		if (n != -1) {
		    cnt = cnt+1;
		}
		if (n == -1) {
			break;
		} 
		if (max < n) {
			max = n;
		}
		if(min > n) {
			min = n;
		}
		if(n!=-1) {
			sum = sum + n;
		}
	}
	cout << fixed << setprecision(6) << max * 1.0 << endl << min * 1.0 << endl << sum * 1.0 /cnt*1.0;
	return 0;
}