#include<bits/stdc++.h>
using namespace std;
int main(){
  double x,sum=0,maxx=INT_MIN,minn=INT_MAX;
  int cnt=0;
  while(cin>>x){
    if(x==-1)break;
    if(x>=maxx)maxx=x;
    if(x<=minn)minn=x;
    sum+=x;
    cnt++;
  }
  cout<<fixed<<setprecision(6);
  cout<<maxx<<endl<<minn<<endl<<sum/cnt;
  return 0;
}