题解

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int n,a[110],big=0,small=1e9;
    long long sum=0;
    cin>>n;
    for(int i=0;i<n;i++){
        cin>>a[i];
        sum+=a[i];
        if(a[i]>big){
            big=a[i];
        }
        if(a[i]<small){
            small=a[i];
        }
    }
    cout<<big<<' '<<small<<' ';
    printf("%.1f",sum*1.0/n);
    return 0;
}