题解 | #记负均正#

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main() {
    int n;
    scanf("%d", &n);
    int arr[100000];
    int i = 0;
    int count = 0, sum = 0, count2 = 0;
    while (i < n) {
        scanf("%d", &arr[i]);
        i++;
    }
    for (i = 0; i < n; i++) {
        if (arr[i] < 0)
            count += 1;
        else if (arr[i] > 0) {
            sum += arr[i];
            count2 += 1;
        }
    }
    if(count2!=0)
    {float avg = (float)sum / count2;
    printf("%d %.1f", count, avg);}
    else {
    printf("%d %.1f",count,0);
    }
    return 0;
}