#include<iostream> using namespace std; int main() { double sum=0,avg=0; int max=-1,min=101,n,a[101]; cin>>n; for(int i=1;i<=n;i++)//统计最大值、最小值、总分。 { cin>>a[i]; sum+=a[i]; if(a[i]>max) max=a[i]; if(a[i]<min) min=a[i]; } avg=sum/n; cout<<sum<<" "; printf("%.2lf",avg); cout<<" "<<max<<" "<<min<<endl; return 0; }