题解 | #记负均正#

#define  _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main()
{
    int n = 0;
    int arr[3000] = { 0 };
    while (scanf("%d", &n) != EOF)
    {
        int i = 0;
        for (i = 0; i < n; i++)
        {
            scanf("%d", &arr[i]);
        }
        int neg = 0;
        int pos = 0;
        int count = 0;     
        double average = 0;
        
        for (i = 0; i < n; i++)
        {
            if (arr[i] < 0)
            {
                neg++;
            }
            else if (arr[i] > 0)
            {
                pos++;
                count += arr[i];
            }        
        }
        if (pos!=0)
            average = (double)count / pos;
        printf("%d %.1lf\n", neg, average);

    }

    return 0;
}