题解 | #记负均正II#

#include <stdio.h>

int main() {
    int a;
    int cnt = 0;
    int pstv_cnt = 0;
    int total = 0;
    while (scanf("%d", &a) != EOF) { // 注意 while 处理多个 case
        if (a < 0) cnt++;
        else {
            pstv_cnt++;
            total += a;
        }
    }
    printf("%d\n%0.1f\n", cnt, (pstv_cnt != 0) ? (float)total / pstv_cnt : 0.0);
    return 0;
}