题解 | #记负均正#

#include<stdio.h>
#include<math.h>
int main()
{
    int num;
    int a[1000];
    while(scanf("%d",&num)!=EOF)
    {
        int count = 0;
        int countint =0;
        float sum = 0;
        for(int i =0;i<num;i++)
        {
            scanf("%d",&a[i]);
            if(a[i]<0)
            {
                count++;
            }
            if(a[i]>0)
            {
                countint++;
                sum+=a[i];
            }
        }
        printf("%d %0.1f\n",count,sum/countint);
    }
}