10370

It is said that 90% of frosh expect to be above average in their class. You are to provide a reality check.

The first line of standard input contains an integer C, the number of test cases. C data sets follow. Each data set begins with an integer, N, the number of people in the class (1 <= N <= 1000). N integers follow, separated by spaces or newlines, each giving the final grade (an integer between 0 and 100) of a student in the class. For each case you are to output a line giving the percentage of students whose grade is above average, rounded to 3 decimal places.

Sample Input

5
5 50 50 70 80 100
7 100 95 90 80 70 60 50
3 70 90 80
3 70 90 81
9 100 99 98 97 96 95 94 93 91

Output for Sample Input

40.000%
57.143%
33.333%
66.667%
55.556%

题意：第一列输入一个整数代表有几组测试数据组数据的第一个整数代表全班人数，接下去输入每人的期末总成绩，算出有几许百分比的学生成绩高于全班均匀成绩，输出是保存小数点后三位。

＃include<stdio.h>
int main（）{
int n，i，f，s，t，a[1001];
float p;
scanf（"％d"，&n）;
while（n--）{
scanf（"％d"，&f）;
s=0;
for（i=0;i<f;i++）{
scanf（"％d"，&a[i]）;
s=s+a[i];}
s=s/f;
t=0;
for（i=0;i<f;i++）
if（a[i]>s） ++t;
p=100.0*t/f;
printf（"％.3f％％\n"，p）;}
}