题解 | #记负均正II#

// HJ105 记负均正2.cpp : 此文件包含 "main" 函数。程序执行将在此处开始并结束。
//

#include<iostream>
#include<bits/stdc++.h>

using namespace std;

int main()
{
	int n;
	int count = 0;
	double sum = 0.0;
	int num=0;
	while (cin >> n)
	{
		if (n < 0)
		{
			count++;
		}
		if (n > 0)
		{
			sum += n;
			num++;
		}
	}
	double a = sum, b = num;
	double res = a / b;
	cout << count << endl;
	if (b == 0)
	{
		cout << "0.0" << endl;
	}
	else
	{
		cout << setprecision(1) << fixed << res << endl;
	}
	return 0;
}