1061：求整数的和与均值-信息学奥赛一本通

#include<algorithm>

#include<cmath>

#include<cstdio>

#include<iostream>

using namespace std;

int main(){

int n,sum=0;

cin>>n;

for(int i=1;i<=n;i++){

int d;

cin>>d;

sum+=d;

}

printf("%d %.5lf",sum,sum*1.0/n);

return 0;

}