1007 Financial Management

水.........

#include<iostream>
#include<cstdio>
#include<cmath>
#include<vector>
#include<algorithm>
#include<queue>
#include<ctime>
#include<cstring>
#include<stdlib.h>
#include<map>
using namespace std;
int i;
double sum,x;
int main()
{
	for(i = 1;i <= 12;i ++)
	{
		cin >> x;
		sum += x;
	}
	printf("$%.2f",sum/12);
	return 0;
}