4344번 평균은 넘겠지

#include <iostream>
#include <cstdio>
 
using namespace std;
 
int main()
{
    int numcases;
    scanf("%d", &numcases);
 
    while (numcases--)
    {
        int stuNum;
        scanf("%d", &stuNum);
 
        int *stuArr = (int*)calloc(stuNum, sizeof(int));
 
        int sum = 0;
 
        for (int i = 0; i < stuNum; i++)
        {
            int score;
            scanf("%d", &score);
            stuArr[i] = score;
            sum += score;
        }
 
        double mid = sum / (double)stuNum;
 
        int upNum = 0;
 
        for(int i = 0; i < stuNum; i++) {
            if(mid < stuArr[i]) upNum++;
        }
 
        double upMid = upNum / (double)stuNum;
 
        int result = upMid * 1000000;
 
        (result % 10 >= 5) ? result = result + 10 - result % 10 : result = result - result % 10;
 
 
        printf("%.3lf%%\n", result / 10000.);
 
        delete [] stuArr;
    }
    return 0;
}