Codeforces 200B Drinks

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/polanwind/article/details/84111358

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cstdio>
#include <math.h>
#include <string>

using namespace std;



int main() {
	int n;
	scanf("%d", &n);
	int cnt = 0;
	for (int i = 1;i <= n;++i) {
		int a;
		scanf("%d", &a);
		cnt += a;
	}
	printf("%lf\n", (double)((double)cnt / n));
	//system("pause");
	return 0;
}