题解 | #记负均正II#

// HJ105-2 记负均正II.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()
{
	vector<int>num;
	int a;
	while (cin >> a)
	{
		num.push_back(a);
	}
	int count = 0;
	double sum = 0.0;
	for (int i = 0; i < num.size(); i++)
	{
		if (num[i] < 0)
		{
			count++;
		}
		else
		{
			sum += num[i];
		}
	}
	cout << count << endl;
	if (count == num.size())
	{
		cout << "0.0" << endl;
	}
	else
	{
		cout << setprecision(1) << fixed << sum / (num.size() - count) << endl;
	}
	return 0;
}