数据精度有问题，用long double 95pts

#include <bits/stdc++.h>
using namespace std;
void solve(){
	int n;
	int sum=0;
	cin>>n;
	for(int i=0;i<n;i++){
		int x;
		cin>>x;
		sum+=x;
	}
  //不能用long double,只能用double
	cout<<fixed<<setprecision(2)<<(long double)sum/n;
}
int main() {
	solve();
	return 0;
}